英语翻译Welcome to the forums.Yes,I am an American from the USA

Welcome to the forums.Yes,I am an American from the USA so I am indeed from some place else.
欢迎来到论坛．是的,我是美国人,所以我是真正的外地人．
After getting the nack of a language like it looks like you have it is indeed best to be on forums among other things to polish the language.(nack在这里应该是knack：诀窍)
知道到了你们学习语言的秘诀后,（我觉得）与其它的学习方式相比,经常在论坛上学习是一种最好的语言学习方法．
I'll be here to help you if you ever need it,tho I'm pretty bad with the language I grew up with.^^;
如果你们需要的话,我会在论坛上帮助你们,尽管我母语学得不好．
So you haven't seen or read One Piece yet you're on here?Hmm...I consider you do.
这样说来,你还没有读过一部分,还是来了,嗯,我想你应该读过的．