Oh, yeah here are a couple things off the top of my head:

1. The core of it is simple: Calories in vs calories out. There are plenty of TDEE calculators. Personally, I underestimate my TDEE but not by much
2. Track EVERYTHING. It's something that has helped me a little bit with curing myself of manchildishness but take on a principle: record your progress or your hard work won't count.
3. Protein is also really important, it helps keep you full and helps protect the muscle you have built. If you're new to lifting or kinda skinnyfat, you might even eek out some muscle gains
4. Find some favorite healthy foods. I for one am a massive weeb so I've learned some good miso and tofu recipes, the latter of which are awesome in sushi bowls.
5. If you're using an app and you bought a can of Uncle Gohan's assblasting chili from the store and it's not on the app, just look for the closest thing there is. If you can't be fully accurate, be precise. If you're consistently wrong, how the number on the scale goes up or down is still good feedback
6. Weekends are a great time to learn to cook and prepare something in advance. Even if your employment situation isn't great, investing some time in cooking something healthy and that you love is great. Seriously, make food fun. I for one love finding new ways to eliminate food waste.
7. YMMV, but minimize snacking and eat good meals. If you find yourself hungry some tea or decaf coffee is a great way to "snack" without snacking.
8. If you drink, while sparkling water may be a 'you either love it or you hate it' thing, I find sparkling lime water is a great way to scratch any itch for a beer and not consume alcohol (which actually does have calories).

Feel free to message me if you want some more, glad to help.