>>2622314
Don't use training wheels they make you improperly learn how turning on a bike works
Buy a bike in your size (look up the height/inseem to top tube cm chart)
Remove the pedals on the bike, make sure you do it properly so you don't strip the threads, one of the pedals are reverse threaded
Push around on the bike with the seat low taking longer and longer glides and eventually turns, this will make you used to how they behave
Raise the seat on the bike the bike higher to a bit lower then it'll be once you put the pedals on to get used to the height you'll be at once you have the pedals, continue to push the bike at that height until you're comfortable
Put the pedals back on and learn to pedal, at this point you'll already be used to balancing the bike.
You'll be able to learn within a week and be comfortable enough to where you can ride on flat trails.
After biking sitting down on flats becomes second nature and just as comfortable as pushing a shopping cart then start to experiment with things like switching gears, using your front brake properly, biking while standing up to go up hills easier, and biking with only 1 arm on the bars.
Once you can do all the above then you'll be good enough that you can bike in traffic