I’d say maybe keep at Blender, the community is huge and the tutorials endless. It’s only complicated until you learn how it works!

There’s also CAD software, like FreeCAD, LibreCAD, etc, which, unfortunately I have no experience of so I can’t tell you if they’re easier or harder to learn and use compared to Blender.

Yeah, pay her. After you pay me for leaving this comment.

Or just charge her for a bunch of stuff you did that night and say you’ve already payed.

Or say you charge the same fee. Or a greater one and she needs to pay up.