The only pre-workout most people would need is some simple carb source (I eat a banana, though I’m not sure if a banana counts as a simple carb source) and maybe a stimulant if you want (I drink coffee) some short time before the actual lifting session.
People on this site who have tried Plazma swear by it, but it’s expensive and I don’t think you really need it unless you’re serious about lifting. There are better things to spend your money on (whey protein, good clean food).
Afaik, the only perfectly legal supplement that actually works is creatine.
Eating healthy is really simple-
Cooking can be challenging, but you can simplify it to a gross degree and get through it if you treat it as a job. Just literally eat things in its natural state- Steam whatever vegetables you enjoy. Eat whole potatoes/sweet potatoes/etc. Eat steak or hamburger patties. It can get boring, but I’ve never really minded it cause I’m too hungry to care.
What do you find difficult about cooking in particular?