Flags and Training Potions, when you get it will give huge boosts. Otherwise it sounds mostly like your levels are just lower than others your are comparing to. You'd have to ask them to find out how far they are in the other systems.

Also you said you only have 2 outfits so far. Each outfit is roughly a 2K BP, some less, some more. So getting 4-5 more would close that 8-10K gap you are talking about.