A lot of good advice here. I'll just say two things: use the built in tutorial. It's actually pretty good, and the built in help can get you going from there.

A lot of good advice here. I'll just say two things: use the built in tutorial. It's actually pretty good, and the built in help can get you going from there. Also, not as a tutorial, but more as a reference, https://emacswiki.org/ https://emacswiki.org/ is a great site for not just information on the editor itself, but all the various modules/hacks people have contributed.