56 inches = 142 cm? That should be fine, size wise. My first board when I was 13 was 160-165, and my second board when I was 14 was certainly a 165 (still got it).
Anyway, I can't speak for the current market, but to me if you're just looking to get started and looking for a board to try out to see how you like it, $40 can't be beat. Heck, I don't know if you can rent a board for that. So even if you get only a few uses out of it, throw it away and buy a new one, you're good.
Just my $0.02