I wanna know spoiler; is Hwashim actually C level or was he just pretending to be one and ...

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He's pretending and does have Gaia trait. They explain later why its so important that he has it.

yes

Ohhh cant wait too see thanks for the spoiler

Is it by any chance his trait is Gaia's dream?

Nope. But Gaia's dream will appear again. *Another spoiler*

Ohh okii thanks for the spoiler ( ╹▽╹ )

Could you share the link where to read the light novel? Pretty please?

I found on novel update..
https://www.novelupdates.com/series/i-delayed-my-death-because-of-a-will/