Get in shape. Lift weights, do cardio, eat healthy. Cut garbage food out of your life completely; no cheat days ever - it needs to be a complete lifestyle, not a “diet”. Learn what macros are, and follow them. Take up running, and make it a habit so that you run every. Single. Day, sun, shine, hail, or snow. (Yes, you can get snowshoes for running in snow. I like barefoot shoes, since that’s easier on my knees and back, but they take a long time to get used to.)
Get an education. Go to school. DO NOT FOLLOW YOUR PASSION; get an education in something that you can stand doing and will actually be employable. Following your passion and trying to make a living doing it leads to burnout. Let your passion be it’s own thing, instead of something that you try to make money from. EDIT - an “education” can also mean going to trade school, if you can’t stomach the idea of sitting behind a desk all day for 40 years. Yes, take English lit classes and art classes if you’re passionate about it, but do that for fun. Depending on a fun thing for keeping a roof over your head quickly leads to fun not being fun anymore.