YOU SAID:

I'm a tad bit concerned with what thou shall propose...

INTO JAPANESE

あなたが何を提案するか少し心配です...

BACK INTO ENGLISH

I'm a little worried about what you would suggest...

INTO JAPANESE

何を提案してもらえるか少し心配なのですが…

BACK INTO ENGLISH

I'm a little worried about what you can suggest...

INTO JAPANESE

何を提案してもらえるか少し悩みますが…

BACK INTO ENGLISH

I'm a little worried about what you can suggest...