@makerinator I did a series of online workshops on FreeCAD:
https://www.youtube.com/playlist?list=PLoAJ3BxlddnqOYELqnTSyGoMBXeWJ4WgK

Maybe it'll help you to get started. Personally I like practical approach where you try to do some applied task (even complicated one) and learn on the way the kind of knowledge and experience you need to get it done.

This playlist is in Russian but there are auto-generated subtitles available.