I have 2016 MB Pro with EndeavourOS as well. I can’t say I don’t like it, but I tend to have quite poor luck with my installs. Each time I get to the customization stage, sth breaks a little. Probably should go pure Arch.
Nevertheless, on MacBooks up to 2014 it should be much easier and require less effort.
Outlook for Windows is the most painful, since it uses Word for rendering. Ask anyone from the guys who make e-mail templates.