Becoming a pro gamer will test you in ways you've never been tested. It requires hard work, talent, a whole lot of luck and, yes, occasionally some world class facilities as shown above but it's not impossible.
Each esports game has its own format for how new players can become professional video gamers. There are usually different levels, ranging from casual game-store leagues to huge arena competitions for a lot of money. To plan how you want to proceed, consider researching how competitions work for your game of choice.