Gmail works fine for me. No need to search for alternatives.

After Gmail merged all the storage limits that you use across all their sevices, I have been looking for an altetnstive. I’d rather pay for a web server to host my mails than google

Self-hosted mail has some pains associated with it in regards to reliability due to major email services rating SMTP servers and tending to not trust personal ones. If moving away from privacy-violating services is your main goal and are open to non-self-hosted alternatives, I'd suggest Proton Mail. They even have a free tier if you want to test the waters. They do have pretty easy migration tools to move away from Gmail as well.