I recently fixed my 3d printer! I need to start printing on it again, I did a few test prints with varying success, but I was able to make snowflake shaped ornaments for my christmas tree!
Use Fusion 360, TinkerCAD, Blender, and PrusaSlicer, they are simple and good for beginners. If you're just starting out, TinkerCAD or Fusion 360 are easiest for modeling, and PrusaSlicer or Cura work well for preparing the print.