Transition to short board?

I am new to surfing and have started on my father in laws 8 foot hybrid (I have been surfing twice a week for 2 months) I picked up on surfing fairly quick and am able to surf the waves in Oceanside fairly well (usually 2-3 foot waves.) I am posting here to see other people's opinions on what kind of board I should transition to next. I feel very comfortable on this board and feel I am ready to step down a notch. I am 6'2 200 lbs. I will only be surfing in the so cal region. I am wanting a board that I could be able to duck dive as well. All comments and opinions are greatly appreciated.