I'm native English and would like to learn Korean

안녕하세요, Beth에요. 반가워요. (O)

 

나는 한국어를 말하지 않는다 (In Korean, I can translate that word like this, 'I don't speak Korean.')

if you have intention to ' I'm not good at speaking Korean, you can say that

'나는 한국어를 잘 못해요.'

 

나는 영어 이다. (In Korean, I can translate that word like this, 'I'm English language.' 영어 means English language.)

you can express like this, 

1) 나는 영어로 말하는 사람이에요. (= I'm a person who speaks english.)

2) 나는 영국인이에요. (= I'm British.)

 

나는 한국어를 구사 하고 싶습니다(O)

아무도 도와 드릴까요? (In Korean, I can translate that word like this: 'Does anyone needs my help?')

If you have an intention to 'does someone help me?' you can say that,

'도와주실 분 있나요?'

I'm not sure you can understand what I wrote because I'm not good at communicating something in English. But, I wish it is helpful for you :)