Can you run ads for an Ebook Store?

Currently looking at getting started with a side hustle business

Hello, am kinda new here hope am welcome?

First timer here. I went against another's advice and did the dynamic ads that was suggested here (it made sense to me). I only did one ad set with 4 ad versions. Should I have done 2 ad sets for comparison and they would have been included in that daily cost? Can I change that after they're already running?? Here is what was suggested for setting up my own agency ads in a different group. I'd love to know the pros and cons from people who are pros at this! I've heard dynamic are more expensive but they seem like less work which I'm ok with... ** If spending under $500 of daily ad budget for your agency: 1 campaign → 2 ad sets → 2 ad versions (same 2 ads in each ad set-make sure to use the exact same ad ID). Choose audiences that have 500,000 – 4 million people **

Hello everyone, here is the little sales i made yesterday after implementing a new marketing strategy