I think a good strategy is to play 2-3 different games and see where you can perform better. Practice more of those games with the practice matches. Once you gain confidence then start participating in tournaments which cost less to register. You can increase the number of games you play only if you have the time, effort, and money to spend. Please don’t overdo it because you are not going to win every time as there are thousands of others like you and me playing to win. Don’t take losing a game/tournament/match too seriously.