I'd like to do something that _____people I'm just not sure what.用help 为啥要用三单形式呢

I'd like to do something that _____people I'm just not sure what.用help 为啥要用三单形式呢

I'd like to do something that _____people I'm just not sure what (to do /it is).
something that will help .
something that helps .
用三单也行,因为something是单数的,不过,通常还是用will help.

something是不定代词用单数