In my opinion all that you need is a new mail provider/host of your choice and an own domain if you want to make future moving of mail providers easier.
Hosting an own mail server should not be your main focus when making an initial switch away from Gmail.
In my opinion all that you need is a new mail provider/host of your choice and an own domain if you want to make future moving of mail providers easier.
Hosting an own mail server should not be your main focus when making an initial switch away from Gmail.