How to get lots of xp BF3? [ONLY LEVEL 3]

I need to get Engi xp quick so I can use that guy's method. Anyone know any methods? I suck at BF so yeah, ROFL. I suck because I only have like 2 different weapons to choose from and no perks :|

Just play the game legit for the first part, it really doesn't take that long to level up when you are such a low level.

The method with the EOD? For me it doesn't work (on PS3). But you have to put down your EOD suicide and then come back and repair the EOD. But for me the EOD stays at full health so i can't do anything:S.