I use Inventor full time at work, but like Fusion 360 more for my home projects (cosplay, 3D printing) the modeling environment is more user-friendly ...

I really like Fusion. A lot.I can't speak to how hard it is. Pick a simple project and give it a try.

Since they do have some similarity. But I feel Rhino is more advance and can model quite complex shape, complex surface stuff easily compare to SolidW...

It’s still quite different, but if u are very good at SoildWork you might be able to learn Rhino fast.

Additionally, a separate upgrade of Bricscad (as if V19) can also come with features used for mechanical design, somewhat similar to Inventor or Solid...