Self-hosting email sucks. Setting up an email server is the easy part, and you'd be able to receive email alright. Sending is a different can of worms and not a fun dinner. Because other email providers will not trust your server and tend to send your messages straight to spam.

I haven't used Tuta, but it looks alright. I've got Proton which works very well for email and VPN, but it is a bit expensive to be honest. But I like ending my address with @pm.me

Haven't dived that deep yet, but who knows. Maybe I'll get there eventually. I've heard good things about this book: https://www.tiltedwindmillpress.com/product/ryoms/

You also don't need to do everything all at once. You can start by getting your own domain and configuring your mail service of choice to handle it. Then whenever you want to move to a different mail service or run your own, you maintain control over your addresses and just need to update your DNS.

Edit: Oh, completely forgot to talk about Proton/Tuta. I set up my stuff on Proton back in the day and recently set up Tuta for my partner. I might get around to swapping to Tuta for my stuff as well, I just haven't bothered to yet.

One user in the instance I use went on that journey, setting up FreeBSD for his own email. I think there's a very detailed comment from one of the big, weekly random threads in our instance, but I can't remember when that happened (also, it's in spanish, so you'd need to translate it if you manage to find it).