I think he is a bit young... I wish the army kept young men like you in a reserve to let the battles to the older men who have steadier hands...
Anyway, learn fast... You have a huge opportunity to learn a lot and to become a strong man... And I'm not talking about muscles.
Never forget one simple thing. Whatver what you will have to do in life, whatever the objectives, there is method to reach it.
Think carefully, think about what you have to do, and what you will need to do it safely. Never dismiss your safety or the safety of your fellow soldiers. Give yourself the means to succeed.