Is there some word/term/phrase for a person who takes risks or just tries (something) without worrying about the failures just because he/she doesn't want to give up without trying?
Risk-taker
might be a potential candidate for such a word but I don't think it is apt enough.
Getting into Oxford isn't a piece of a cake by any means, as it is world's top ranked university; but Oxford couldn't resist this __________ lad, who didn't want to wonder all his life whether he could have secured admission.