Question - 1st POV or 3rd POV

Since I'm going to pick up writing Multiversal: The Shop which writing perspective should I use?

Should I continue using first person view in our protagonist? Like 'I' 'Me' 'Myself'

Or should I switch to the more third person view? Like 'He' 'Them' 'Their' in the newest chapters?

First PoV is more of a self-insert kind of thing.

Anyway, which should style should I use?