To level up users gain experience from every match they participate in.
The number of experience points you earned are affected by number of kills, amount of damage inflicted and amount of time spent playing a match. All of those actions in the game are point based, the greater the end game score for that player, the more experience is earned. Also the higher the in-game Collection Title, it gives a greater experience and ticket bonus.
welcome to Big Head BASHkeekee11, there is a tutorial section on the home screen. Once there, you can learn the basics o f the game, like movement and shooting. Give that a try and you should get going soon after that.