Well I'm fairly new to this game, and am mostly playing the rifleman class because I kinda feel like I could play with stuff like most of the fancier small arms in the other roles in other shooters anyway. Right now I'm seeking to get myself a Kar98 bayonet, and am spending most of my time dying without seeing the enemy or seeing them and then totally missing (or missing a kill shot)/not firing fast enough and dying anyway whenever I try advancing. Camping and sitting around good upper-vantage points works slightly better for me, but the practice is pretty self-explanatory anyway.
So I ask, can you give me advice on how to go forward as a rifleman with some degree of reliability outside of maybe exposing the enemy's muzzle flash to my allies with my demise?