Honestly?
Unless it is a VERY strong ideological reason, there is no reason to ever subject yourself to FreeCAD. It is an awesome tool but the UI/UX is so illogical that it makes Blender seem sane. And, to be fair, Blender IS sane once you start thinking the right way. FreeCAD you have to think like twenty different ways.
And for 3d printing? If you are windows (or mac?), the free version of Fusion 360 is all you need. If you are Linux things get a bit more annoying but I have found myself genuinely loving OnShape (also apparently the lineage goes back to the tool I learned back during high school). Yeah... everything is theoretically publicly accessible and forkable which is good from a community standpoint and bad from a privacy. But my designs aren't anywhere near good enough for industry to steal and I can always use a code name for anything that I might not want people to know I am working on.
That said, I think there have been a few semi-sketchy forks of FreeCAD that give it a sane UI/UX? I think Maker's Muse did a semi-recent video where he talked about a few of those.