well, being 14 years old for 3-4 years would induce a paradox (max duration for being 14 years old is 1 year). But being discovered at 8-9 years old due to, for example, his mother moving about a lot would fit. that would give him 5-6 years of training, which is enough to learn a good bit of lore and some basics, yet still be quite inexperienced.