If you want a full-service email client with calendar, tasks, and chat built-in, and can't get or don't want Outlook, then Thunderbird is the way to go.  It's always been accessible and the folks who develop it have shown an ongoing commitment to keeping it that way.  There are scads of tutorials and discussions in the various screen reader group archives about using Thunderbird.

eM Client was good, too, but had some accessibility issues.  They had been working on at least some of those, but I have not had a chance to play around with version 9.2, which just came out.  A disadvantage is that the free version for individual use only supports 2 email accounts, but if that's all you have, it may be worth looking at.
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Brian - Virginia, USA - Windows 10, 64-Bit, Version 22H2, Build 19045  

If you cannot or will not imagine the results of your actions, there’s no way you can act morally or responsibly.  Little kids can’t do it; babies are morally monsters — completely greedy. Their imagination has to be trained into foresight and empathy.

         ~ Ursula LeGuin, 2005 Interview in The Guardian

I don't know about any tutorials, but I'd be surprised if there weren't any. I use Thunderbird version 91. It has plenty of hot keys and if you need it also has a calendar. You can also use it to watch podcast and rss feeds. The current version is something like 102 but I won't use it because I do not like what they did to the address book, I find it to be far less usable than the address book in version 91.

Gene...

Hi guys
So I just want some different points of view. I used to like Outlook
Express, but Outlook was nice because of the calendar and everything.
Unfortunately I don't have Office 365, so what email client do you
guys like using with jaws?
Anything with hotkeys and a good tutorial?
Thanks