Welcome to the HorseForum!
What are you planning on doing with him?
He's cute, I love his color! He's a tad pidgeon-chested from what I can see... can't really comment on his pasterns as they're blocked off :) Nice short back.. although it looks swayed (not majorly, just like it ties into his hindquarter and shoulder funny).
Anyways, depending on what you're wanting to do, as well as if you're confident in riding a youngster, I say go for it :)