안녕하세요~ Kind of new!

[Silverleaf]

-closed- ~~

[dtymazda]

Welcome Alice.

Don't worry about making mistakes, it's all part of the process. Here's a response in Korean.

알리스 씨, 반갑습니다. 저는 이강빈이에요. 저도 미국에서 살아요. 그렇지만 학교에 안 가요.

just a few corrections to what your wrote:

학교 = school
미안해 = impolite form of sorry, better to use 미안해요 with people you don't know.
안녕하세요 = hello. 안녕 is ok for close friends, not strangers.
n+입니다 = noun is. You used 임니다. You wrote it the way you hear it. because of a pronunciation rule, any time a trailing consonant is a ㅂ, and the next syllable block starts with ㄴ, the rule changes the ㅂ to ㅁ. so while you hear the word as 아리수 임니다, in actuality, you write it as 아리수입니다

화이팅! 잘 했어요.

[jiberish]

Yeah, things are often wrote quite different to how they are pronounced.