I don't pretend (that) I know much about the subject, but...

我不敢说自己对这个主题有多了解，但是…

《牛津词典》

I know, much of it is me.

我知道，绝大多数是因为我。

youdao

I know much about you.

我很了解你。

youdao

I know of him, but I can't say I know much about him.

我听说过这个人，但我不能说很熟悉他。

youdao

I know of him, but I can't say I know much about him.

我听说过这个人，但我不能说很熟悉他。

youdao