Question for Combat arms experts?

Ok, I am like almost brand new to the game. I need help. Like major help. I suck at the game. I never know what a good weapon is. I finally figured out what recoil is. Apparently the lower recoil, the less it will move up down sideways after fired. I think I got that right. I also, never really know what the best weapons are for certain maps and games. I need major help. If you can help me, that would be great. I don't have nx atm so please, if you suggest a weapon, plz make it gp available. I am a rank R..