Creating Emails for IG accounts

A while back one of my friend’s who owns a few pages on IG was hacked but able to recover his pages… he was giving me tips on how to keep them secure like only using one email per account. I’ve made about 30 accounts which I follow/unfollow and post on…

Unfortunately I can’t make any more gmails with my number( or my fiancés)

Should I just start making other email server accounts or does anyone know a work around for that?