>>28550787 (OP)>I have like 20k dollars to invest into somethingPay for a cumunity college auto shop course though if you're poor in the US you can get financial aid, Pell grants and lottery money etc. If your banked assets are too high, get a safety deposit box and withdraw your stash as cash then store that safely.
Then make an informed tool and equipment purchase plan that suits your situation which can include apartment and dorm life because I did it. Do not overspend since you won't need more than the tools you use as jobs arise. Save as much money as you can for a cash cushion.
You probably won't do this but if you did your vehicle options skyrocket and the skills you learn pay off for life in much more than cars even if you never got a related job (though the barrier to entry is low for mechanics).
Buying tools before toys yields MANY more toys because tools enable choices the non-wrenchers do not have. Wrenching is an amazing financial multiplier but you probably don't believe that, either.
I didn't fall out of my mother's cunt with a wrench in my hand. I chose to learn by doing and relentless study and I am not at all special. Neither are my gearhead bros (I have no use for helpless frens who are really parasites) who also wallow in vehicles, built their own workshops (we help each other because it's fun), and are either debt free or nearly so. (I'm debt free and retired early thanks to leading a wrenchful techie life.
I own at least one of every motorcycle I ever wanted yet never made six figures.