Take care of your body. Eat as best you can
Forgot to add eating to my take care of your body post but this is very important. Learn some basic cooking skills. The skill ceiling for cooking is in orbit but the floor for just keeping yourself fed better and cheaper than takeout slop is low. A few easy recipes go a long way, there's a lot of stuff you can make in a single pan in 20-30 minutes.
My first adult health issue was caused by food. Drinking a mug of shitty instant coffee on an empty stomach for breakfast then greasy fast food slop for lunch. My stomach went on strike after a few months.
