The specific details will change, but the principles remain the same. If you fail to comprehend something now, you set yourself up for compounded problems later. Deal with the issue now, while it is fresh in your mind. The best way to keep up is to plan to do organic every day. The basketball player, the swimmer, the violinist, the dancer, the student of foreign language, all of them practice daily if they are to succeed and improve.
Organic chemistry takes time and practice.
It takes discipline and planning. But so does weight training. Just do it. Learn, Don't Memorize Organic chemistry consists of a few basic principles and many extensions and applications of these principles. There IS rhyme and reason to organic chemistry.