(Have read you’re not interested in self hosting - I think that’s very sensible. It’s a lot of work and even then, very difficult to do it well and be reliable)
Suggest finding a reputable email provider, and they will require payment.
I recently moved from gmail to proton. The migration process was very smooth, with proton copying over all my existing email and calendars from gmail. However, their web clients are very slow in comparison (since they’re encrypted - click on an email and it’s 3 seconds or so to open, an eternity!). I find that annoying enough that I’ve setup thunderbird via a proxy, but that has negated some of the ease of use.
There are quite a few good options around, maybe others will chip in with recommendations.
Once you have a new mail client, your user@gmail.com address will not be valid. However, if you want it to, you can keep your old email account with gmail as well, and have it forward all incoming email to your new home. That allows you to gradually move your accounts over at your own speed. I think this is important as there will be more than you expect of them, but the process isn’t hard.
Most of those new providers will also allow you to use a personal domain, and multiple users. So you can register a domain that stays with you - that’s the domain.org bit of your email address, and multiple users - the bit before the @.
The good providers will have guides and documentation about helping you through this also.









Wear skirt. Go to work.
I don’t know what I’m missing here. Unless there’s a safety reason to the job or a mandatory uniform, why would anyone care? Maybe you’re in a particularly repressive country and I don’t understand the nature of the problem, or why religion comes into it.