do it (also go in community servers instead of casual servers because they let you talk and use voice commands even if you’re a F2P (because the bot problem got so bad they won’t let you communicate if you haven’t bought something))
all classes are available, and weapons are random drops / rewards for doing contracts. the only things you have to pay for is cosmetics and keys for unlocking crates.
you have a primary, secondary and melee weapon. you press 1 2 and 3 to equip them, or use the scroll wheel. you can also press Q to swap between the last 2 weapons you used. also you can press ESC to go to the menu and open your inventory