Advice

Hi I'm currently taking lessons and need first board advice. I will start off by saying I'm 5'6 117lb male. A friend gave me this epoxy shortboard board he didn't need anymore the dimensions are 6'2 - 18 3/4 - 2 1/4. I was wondering if I could progress on this board. I live right by the beach and can surf at least twice a week. I live in Encinitas so I would say 1-4ft waves usually. If this isn't the case and I should switch to shortboard from a longboard down the road what size longboard would I need. 
