In my opinion organic chemistry is all about trends. If you understand the trend you'll understand so much. If you can focus on the trends of nucleophiles, electrophiles, bases, acids, etc...you'll be able to understand the mechanisms and what is happening in a reaction. So I would focus on learning the trends and the exceptions as well. O-chem is mostly visual but if you can understand the basic trends you should be successful.
You may want to think about finding a tutor if you are struggling or want to stay ahead of the class. Another option is looking up chad's videos because he is the O-Chem king. Best of luck!