I’d suggest trying FairEmail on your phone, email.faircode.eu, before trying to set up an email server.
I would ask if you have good knowledge of IMAP. That allows access to a unified inbox from several devices and you don’t have to own the server. It is far preferable to webmail for me.
I host my own email server and use many devices all over IMAP. If you need a server, nixos-mailserver is my recommendation. You could then try Roundcube on top but I bet you will use IMAP instead before you get there.