YOU SAID:

This is fun, though I don't think I'm very good at it

INTO JAPANESE

これは楽しいですが、私はそれがとても上手だとは思わない

BACK INTO ENGLISH

This is fun, but I do not think it is very good

INTO JAPANESE

これは楽しいですが、私はそれがとても良いとは思わない

BACK INTO ENGLISH

This is fun, but I do not think it's very good

INTO JAPANESE

これは楽しいですが、とても良いとは思いません

BACK INTO ENGLISH

This is fun, but I do not think it's very good