If the major concern is the UI, not the Gmail server, using another email client (desktop email client) is an easier solution. There is a big gap between using

If the major concern is the UI, not the Gmail server, using another email client (desktop email client) is an easier solution. There is a big gap between using another client and setting up a new email server altogether. An alternative may be also paying another email provider, and probably setting up your own domain name for it, for easier migration eventually.