To - much better learn to use Archicad - use Archicad to create 3D elements such as furniture. Other progams can do that better of course - like Blender or Rhino, but its a possible huge task to learn them - and if you don't have other reasons - its not worth the effort.
Blender would have the benefit of an open source-program. Other programs are not so "cheap". But blender is not cheap in a way that it takes a year or so to get used to its interface to work propperly. There are uncounted blender-tutorials and i would suggest, you begin with a donut-tutorial. It has the fastest development these last years over all other programs by the way.
But - as mentioned above - use archicad and get better there!
AC5.5-AC25EduAut, PC-Win10, MacbookAirM1