To clarify, I gave him so few skills because he hasn't even been trained for any sort of job. He isn't in the military, he isn't an office worker, janitor, etc.
He's a teenager. Likely supposed to be still in the equivalent of high school.
Also, I know his history is a bit short, but honestly I have nothing better to give him. He grew up, moving from place to place with his family, and now his memory loss has gotten him into a heap of trouble on a planet most people haven't even heard of.
He is a character ready to be shaped, because nothing is decided upon him. This plot will develop him. He will live or die learning to cope with his condition and with himself as he matures.
At least, that's the plan.