How to become a racing drone pilot

I'm not yet a racing drone pilot, but I want to learn. Instead of rushing into buying a drone I decided that it would be wiser, first, to learn piloting with a drone simulator: Liftoff. I have a PlayStation 3 controller for gaming, so I used it to get an idea on how it is to fly a racing drone in acro.

After learning some skills with Liftoff, I plan to buy one of these transmitters:

The choice of the transmitter is essential. Do your own research before buying one. Personally, for me the Q X7 seems the best choice to begin with. Eventually when I'll be experienced and passionate enough I may buy the smaller X-Lite for the portability. But for now I need to spend more time on the simulator...