I mirror all my stuff on Gitlab just in case GitHub goes away, it probably won’t happen but I like having backups! :)

If you want extremely low overhead you can use the API directly with curl. Most hosting providers/registrars allow this.

You can use Ansible to create domain names and register URLs on most popular hosting providers/registrars.

You shouldn’t avoid platforms just because they have non-free websites, that’s extreme bro.