I’ve never used this but I have seen plenty of people recommend it:

Yunohost

I just had a look at their documentation and it seems pretty beginner friendly so will be a food way to go for you.

I self-hosted my own email for a few years, everything was set up and reporting correctly, but Google just would never have it. I think the worst is it would be a bit inconsistent.

Anyway, I switched to an email provider with my own domain and it’s much more reliable. That is until this week, I have noticed that some services are rejecting my domain. I think there is some whitelisting nonsense going on, but in those instances I just use an alias and that seems to work.

I just want to have control of my data!