Beyond TinkcerCAD

What CAD can you guys recommend for progressing beyond TinkerCAD?

I really enjoy OpenSCAD and will continue to build that skillset but sometimes I just want to much about with a mouse in 3D space. I used to really enjoy doing mockups in SketchUP when that was still a free Google project.

I'm definitely not designing engines or commercial products. I'm mostly just designing small things for the 3D printer.

Also, Open Source is a must. I'd rather struggle with a free product that could be made better than pay for a commercial product that does way more than what I need it for.