I understand you very well since I too had several difficulties the first few times and it took me more than six months to understand just how objects could be moved in the scene, but I'm talking about many years ago. I realize that it may be useless for you, but perhaps this could be a more compliant alternative solution, but this too is not immediately easy to learn.

this is an extension for FreeCAD
https://wiki.freecadweb.org/Animation_Workbench

some video examples http://freecadbuch.de/doku.php?id=animation:videos