Tim Visher <tim.visher@gmail.com> writes:

> [...]
>
> One of these days though I'm going to break the habit and move email
> directly into Emacs. :)

I was in the exact same situation as you until about half a year ago,
which was when I decided to (finally) act on my "move email to emacs"
task.

Coincidentally I have recently released a blog post covering some of the
basic aspects of planning the switch:

                https://condition-alpha.com/blog/?p=1792

…

The smallest, and most isolated task is perhaps configuring msmtp for
sending mail; so why not start with that?

…

If you start a big all-in-one migration, and it fails, you're left with
a big mess. Thus, doing things step-by-step with an option to revert
each step if it doesn't work, is crucial, too.