Hi, I'm a email marketer.
I used to do marketing for my self with G-suite back in the days.
Provided G-suite setup one of my clients.
For this you need these things:
1: Purchased domain and access to control panel for changing name servers.
2: A card for purchase G-suite subscription, 5$ one is better for start and limited use.
G-suite offers control panel, using it you can create as many emails you want.
Hope you have whole picture how it gets done.
Looking forward to discuss more in details.
Thanks.