how do i level do i have to play online orr single player please and ty

You mostly get points from playing multi-player games.

See https://www.warzone.com/wiki/Points for a breakdown on how much xp you get from what.

If you play single player or idle you can get a small number of points from achievements, but you won't be able to level much from those.

multi day games are more points. ladders and tournaments are more points. coin games are more points. there is also a community here called "Lotto" where they farm points. more points ==> higher level