Actually, you can make a lens flare with PSP :P

PSP is probably your best bet. If you mastered regular MSpaint, then you can get adjusted to PSP. The only thing bad about it is the trial evaluation (gasps!)

On the other hand, if you can general draw well on paper, maybe you should just try scaning your drawings and then you could edit it with a paint program (that's what I kinda did :P). If you don't have one, try asking someone else.