I'm just not good at writing letters.

我只是不擅长写信。

youdao

I'm not good at reading and writing, so I must be doing something in it more.

我不擅长读和写，因此我必须在这上面多做一些。

youdao

I'm not the kind of person who is good at talking and writing to express myself. In contrast, I prefer painting.

我是一个不善于用语言和文字表达自己的人，相对而言，更喜欢用绘画表达内心。

youdao