It's perfectly fine to play it casually - I play casually every match. Play to have fun, and enjoy it. The learning curve will be pretty steep if you aren't good at clicking heads and who cares what people think of how you play?
Ranked mode isn't enabled yet since the full launch so it's technically all causal. There's also a new mode that came with release called spike rush. First to 4 wins, everyone gets assigned the same gun at the start of the round, you have all your utility, and everyone on the attacking team has the bomb. There are upgrade orbs around the map that give you boosts too, but you're at risk of being shot whilst collecting them. Each game lasts about 10 minutes max, it's super fun.
Ranked mode isn't enabled yet since the full launch so it's technically all causal. There's also a new mode that came with release called spike rush. First to 4 wins, everyone gets assigned the same gun at the start of the round, you have all your utility, and everyone on the attacking team has the bomb. There are upgrade orbs around the map that give you boosts too, but you're at risk of being shot whilst collecting them. Each game lasts about 10 minutes max, it's super fun.