Hello there,

Thee way i recommend doing is the next one.

H1 (one per page)
H2 (Name of the section, for example How to improve SEO)
H3 (Linkbuilding . it connects to the H2 of "how to improve SEO")
H3 (Blog post. it connects to the H2 too)
H3(Guest posting)

and so on... Never never use more than an H1 on the same page and don't overused H2 as well.

I hope it's clear, let me know if i can help youy with something else.