Neomutt (with notmuch) is not easy when starting from scratch. Luckily there are some configurations online that get you up and running quickly. It still requires some efforts to get use to it and configured to your detailed and specific needs. I put sweat to build mine but it worth every single drop.
That being said that’s what makes its strength. It’s not an email client, it’s your email client. Once it’s configured, it’s good forever and using anything else feels like a pain.

Here to promote nmh, the hands down best email client in existence

Here are my dotfiles for you to have a look and get an idea: https://codeberg.org/n0p1lls/Config/src/branch/main/dotfiles

There you can see how to configure the mutt client, adjusting it to you through some small changes.

For example, instead of: “set record=“imaps://imap.gmail.com/[Gmail]/Enviados” for your gmail account, if your language is English, it would be something like this: “set record=“imaps://imap.gmail.com/[Gmail]/Sent".

More information at: https://wiki.archlinux.org/title/Mutt

If you want to configure the keybindings, see this section: https://neomutt.org/guide/configuration#6- changing-the-default-key-bindings

I tried aerc, neomutt, and alpine a while back and preferred aerc. Neomutt was a bit too much config for my liking. Alpine was ok but aerc was my easier to get everything setup the way I wanted.

I switched recently from neomutt to aerc and yes, if you want less complicated configuration, it’s a great pick. I find it less buggy and just best designed overall.

I never tried Gmail or Exchange on it, but this should have some helpful info on that: https://man.sr.ht/~rjarry/aerc/providers/