I am terrible at Mario Kart World. Help needed!!!!

Gaming was never my strong point, but boy do I suck at MKW. I’ve won a few races on 100cc but 90% of me coming 1st place has been done on 50cc. Just playing single player mode. One thing I’m terrible at is losing control on corners, and not being able to get back on the straight, so I’m constantly falling over the side of the track or going into the barriers. Am I supposed to be breaking at the same time as drifting? Maybe it’s my age, and my lack of MK experience. Never played it before.