Most novice to average players generally can find a hole in their game, residing in their starting hand selection. If you are too general with your hand selection, you will likely find yourself out-kicked; so you might want to upgrade your selection. What follows is just some general advice for starting hand selection in the three main positions, you may or may not already be aware of this, but since you asked:
Early Position - You'll need very high quality hands - i.e. TT+, AK, AQ and maybe KQ. Hands like AJ, AT, KJ and QJ are problematic with any signals of strength from players acting behind you in position, so your better off just mucking them pre-flop and waiting for better position to play them. Drawing hands like Suited Connectors and Ax are also problematic from this position because finding out how much it'll cost you to draw might end up costing you more than you think. There is an argument for playing 99-, but the odds of you hitting are fairly negligible and if raise/re-raised you may find yourself out of position with top pair looking at a drawy board while up against a bigger pair. Because you are limited with your BR, I'd suggest that you pass on these cards from this position till you increase that BR.
Middle Position - You can start to add to that EP hand selection line up with hands like AJ, AT, KJ, QJ and JT, but be careful. Having these cards suited gives them more strength with the number outs you might have, but again you will need to be cautious with any signals of strength coming behind you. Drawing hands are a little more acceptable for this position, but you will still need to be very cautious in your selection and table dynamics should weigh heavily in your decision making process; if the table is loose and aggressive - lay back, if the table is tight and passive call or push and in between choose carefully. Pocket pairs ranging from 44 to 99 are much more plausible but you will still want to get in cheap.
Late Position - You can open up a lot more in this position, pushing with high quality cards when the table limps and likewise calling a very wide range of drawing hands in the same scenario. But, you will need to respect signals of strength from players acting before you unless your holding a high quality starting hand. Stealing the Blinds or Buying the Button can be profitable, but fluctuated your attempts to keep from making your intentions obvious and only make continuation bets with a favorable board. Calling with drawing hands is also more acceptable and profitable, but because your bankroll is still relatively small you might still want to limit the number of drawing hands you stick with. Ax hold a higher level of strength, if no one raises in front of you, but you might still want to keep it at A8+ and play it tenatively if you hit top pair.
There's more to it, but this is just some general stuff that might help. Additionally, keep your bluffing to an absolute minimum. Most novice to average players bluff
far too often and with the size of your bankroll you don't have the luxury of being found out too often. Hope this helps and GL!
NuRelic