I'd recommend sticking to 32 player servers for now. 62man servers get crazy as it's grenades, vehicles and snipers EVERYWHERE.
-edit-
Here's some beginner's tips for you as well.
-pressing F2 in a vehicle lets you switch to the second seat. This ranges from F1 (driver/gunner) all the way to F5
-when playing assault, you don't need to look at your teammate to revive them
-laser sights are visible through smoke
-when in the RHIB, pressing F5 puts on the jetski for quick getaways
-to pick up a soldier's kit, hold E when looking at his weapon (this is useful to revive teammates if they are playing assault and you aren't)
-you cannot load ammo into guns you pick up on maps (.50 cal sniper etc)
-use 'Q' to spot enemies
-'Q' is also used to request ammo, health, orders etc
-when playing as a squad leader, hold 'Q' to give orders to your squadmates as well as request items from the commander
-enemies can be spotted through smoke grenades
-you can hold 'E' and run towards a vehicle to enter instead of spamming 'E'
-C4, SLAMS, and Claymores can be detonated by shooting them
-pilots can be shot out of all air vehicles
-at full health, tanks need 3 C4 charges to be destroyed
-you can counter a knife kill by pressing 'F'
-knife kills cannot be countered from the side or back





