It would help to have some idea of what your goals are... I realize you have very few dives and are just getting into diving, but is there something that attracted you in the first place (marine life, wrecks, travel, caves) and is there some related interest that may influence future goals (history, archeology, photography)?
For the immediate future, I would suggest a nitrox course. Although you are an SDI level diver, I would recommend a TDI nitrox course because it is more detail oriented and completing it may help you to understand some of the concepts you appear to be challenged by.
I would also suggest strongly spending the rest of the summer and fall building your experience by diving with others divers who have more water time under their belts than you do.
With regards to your current SDI OW plus Advanced Adventure Specialty certification, you must dive within NDLs and a maximum depth of 30 metres / 100 feet in conditions similar to or better than those you trained in.
