Make everything yourself, do it cheap, because I drop hobbies like a mutha fucker.

I should have been less willing to buy an electric bass that's too heavy to me. I got a maple-body Jazz Bass ~10 years ago, back then it was kinda heavy but fine for me, today I'm quite a bit less fit than I was then and no amount of wide, cushioned straps are able to make this a good experience for me nowadays, and since I play lefty it's a PITA to sell it. Until the shoulder and back pain kick in it does sound and play great, though.
IMO, Ibanez Soundgear has the best ergonomics as far as relatively affordable basses go that aren't headless - pretty lightweight and yet the opposite of top-heavy. I never liked their sound out of the box, though, and aftermarket pickups that fit the cavities without woodworking are kinda expensive.

Rock climbing:

• Do regular full body workouts/yoga/antagonist work. A lack of core strength and scapular stability will end up wrecking you if all you do is climb.
• To get better at climbing, training helps a lot. But 90% of the training you need to do is just climbing more. Your problem isnt that you arent strong enough, it's that you havent developed the necessary techniques to climb harder because you havent experienced enough rock. 90% of the change you need to improve your climbing is simply to start consistently logging what you do in your climbing sessions.
• Work your way up to climbing 20 pitches per day, 4 days per week, lowering the grade as much as needed to get the pitches in. You'll find your biggest problem here is simply time management and finding a willing partner. This is a great time to get used to leading, since almost all your pitches will be quite easy.
• Once you can consistently get 20 pitches in per climbing day, start increasing the number of pitches at your onsight grade. Your sweet spot for progression is a climb that you may or may not be able to get on the onsight attempt, but which you will probably get second go. Aim to put 10 burns on onsight-level climbs per day.
• Once you stop easily progressing through the grades week by week, your climbing logbook comes into its own. If you find that a certain grade feels like it would take more that 2 or so attempts to put down, start tracking sends in the grade below it. You are only allowed to be disappointed in your inability to send the new harder grade in when you have put down 100 sends on the grade below it.
• When progress starts stagnating purely from increasing volume, start bouldering one or two days per week instead of rope climbing. It can be satisfying to send boulder problems, but spend at least some of your time on boulders that are so hard that you can only do one or two moves at a time - practicing doing just one or two extremely hard moves at a time is where you will really learn how to use your body. It is helpful to boulder in a big group, so you are forced to rest between burns.
• The easiest way to improve at climbing is to climb a lot with people who are better than you. If you can do this, disregard all previous instructions and just go climbing with these people.

For digital photography, the only thing I wish I really knew was how to clean the sensor sooner. I made a decent choice with the tech stack for the camera.

Typewriters - mostly just buying/using them, haven't delved too much into the actual restoration/cleaning part just yet:

• There's a Discord that has a lot of information and a nice, welcoming community.
• Typewriter Database is a very handy tool to help you identify your typewriter model and year based on the serial number.
• The case can get messed up depending what you clean with, so do your research well so that you don't accidentally strip the paint.
• Estate/garage sales are great for finding typewriters.
• When buying a typewriter, bring a piece of paper with you and test it out: type with every key, use the shift and caps lock, try the red and black inks, backspace, tab, set a few tabs and then tab through each one, reach the end of the line and see if the bell rings, etc. Don't let social anxiety get in the way of you testing a product before buying, especially if it's costing a pretty penny.
• Speaking of price, I'm not sure how it is everywhere, but where I am you can get a good typewriter for under $100, even under $50, fairly consistently. I just went on OfferUp and I was able to find a few at around $50 that I would purchase myself tonight if I wasn't already strapped for cash.
• The few typewriters I would spend over $100 on if I had the money (all in working condition, even better if it has a case): Royal Model 10 with the glass side, Olivetti Lettera 33, and the Hermes Baby.

A box of comics isn’t going to take up too much space.

Boxes of comics have taken over an entire room.

I have too many hobbies. Can never find enough time for everything. Gaming has probably been my longest and most expensive one though. Between all the hardware and software purchases I wish I had simply been more patient earlier in my engagement. Could have saved so much money. These days I cruise the steam sales for indies and I'm having a great time.

About me when it comes to all of my hobbies: I like to collect things.

If the suction is too strong, a vacuum can injure your penis.

Hydroponics, how heavy a 10 gallon tote is filled with water. With about 8 gallons of water in it, it's about 67 lbs. Thankfully I don't need to move my basic deep water culture setup and it's stable. It's been a great learning experience, but moving forward if I expand I'm going with the nutrient film technique.

You get a much wider margin of error brewing 5 gallons in a bucket instead of starting with 1 gallon as a trial.

When I first made mead I just did a 1 gallon batch to see how it worked but that doesn't really leave you with enough of a must to do proper gravity measurements without losing half your yield.

IIT: lots of wisdom

Needlework is hard on rhe hands. I wear compression gloves and wrist braces when cross stitxhing to minimize the impact on my hands. I need to talk to a doctor about my hands but i try to take good care of them even when playing games i wear a brace.

It eats too much time (and money).