BAD IDEA
I have a dumb friend, can I do anything to help him?
Sure, but if he's dumb enough, your brain might start hurting instead.
Helping a friend who's not the sharpest tool in the shed is noble, but don't expect miracles. Education, patience, and occasionally facepalming can help, but intelligence isn't a switch you flip. Try guiding them gently, or you might just end up wishing you didn't bother.