What is a convenient 3D modeling program for subsequent printing on a 3D printer?

Question

3D

Greetings!
Actually, the question was already formulated in the title. I don't need to design any animals or typewriters. My task is to make cases for electronic equipment. These are basically rectangular boxes. Please tell me in what software it is easy and understandable to do this so that you can then save it in * .obj or * .stl and print it on a 3D printer. Installed Rhinoceros 3D, but for me it's kind of too complicated.
Thank you.

Answer 1

sketchup

Answer 2

I use SolidWorks because it has a good range of modeling tools.