Looking for advice..?

Hi, I'm basically on here because i know very little about surfing. I'm looking to start surfing during the summer as i live near the coast. I'm about 5' 7 and 8- 8 and a half stone, I've been saving for a board or a while now and I'm looking at one which costs 210, its secondhand, its an epoxy board (could someone tell me what this is?) its 6' 10 and a mini mal type of board? Basically, i have no clue if this is suitable for me and i know no one with the knowledge to tell me! Please help! All advice is welcome!!