> would love to know if I can get AmigaWriter, an m68k program, to install on my system.

There's an older thread that might be of help:
https://morph.zone/modules/newbb_plus/viewtopic.php?topic_id=9508&forum=9

> I tried the same thing with email clients but couldn't get those to run.

YAM and SimpleMail have MorphOS versions that should run.