im 15 and i suck at art and dont care about my grammar because its a forum, and not english class.
well... you have paint.net ... he need a neck. the proportions are off. like his legs it looks like one is attached in front of the other. he needs cloths. so u could use jeans to portray 3d. just add back or from pockets to help with the proportions. no ones arms have ever been like that unless there are viruses involved. so with a shirt add better looking hand. you dont need detail. just a circle will work for the hands. hair and a ear. u can use hair to cover the hair so u dont need to add one.
and lastly you need to study other art more. there is an entire dictionary of pieces to study. cut and paste if you half to a little from this and a little from that. just give credit from everything you take. and in no time you could be very good at this.
i didnt want it to be realistic because i wanted it to look like it was from an old game. thanks for teling me about the legs though, i thought that would be good for what i was trying to do.