2. It's nothing to be ashamed of - take any American, teach him Korean and
see how well he speaks or uses Korean. You bet he'll suck at it, and
he'll suck at it big time.
//"suck" is not appropriate here, unless this is a troll.
Ok. He [won't be as proficient as you are now at English]
Happy now? :-)
//And why American in specific?
Can be anybody. I just grabbed American because I personally don't like'em
too much.
3. My verdict? Practice makes perfect.
//Verdict? How about opinion?
Your advice is well taken.