How do I use Istagram as private as possible?

Ok so here is the situation:

As many here (I guess), I dont like Meta, but since I want to promote my 3D-printed stuff more, I see my self in a position where there is no way around Instagram 🤢

So my question is, if maybe someone here already uses Instagram here "privately" or if someone has ideas on how to use it but still giving Meta as few info as possible?

My idea at the moment would be to use Mullvad for every traffic going to insta. For signup I will of course use an email with a custom-domain that is never used somewhere else and if I like other posts, I will only use the account, related to my business. My personal account is just for getting in touch with real people I know and to promote my business-account. The personal account will not have my real name and uses also a different email from a custom domain.

Thanks in advance for you comments and trust my, I really hate having to submit to Meta and their stupid social media crap....

Edit: Thanks for all your great feedback. I will def. look into all of these ideas 👍

I also forgot two things:

1. I am using Linux only for this on PC and no Windows(dont know if this changes anything)
2. I am using LibreWolf on Linux Mint and Waterfox on Graphene OS (of course with Ublock and Privacy Badger ;) )