It mostly doesnt matter what instance you choose as you can talk with almost any other instance.

since there isn’t an advantage of one instance over another and you can talk to everyone, why/ what are the benefits of joining a specific instance?

sidebar: would it be possible to change instances after account creation?

yeah, makes sense. The cynical part of my mind also led me to your 2nd explanation. :)

I’d do a PR. Although I would understand forking if the project maintainers wouldn’t merge a PR. (or create an issue (for the fix/ addition) if the README says that it’s an option)

I’d agree that blender is very good. I find that it would be more suited to static stuff and renderings, as well as animations. FreeCAD is more like the commercial CAD software you’d find (Fusion 360, Solidworks).

On the topic of blender, It has some amazing features, and I am amazed at what people do with it (I also find it a bit tricky, but I probably just need to put a few more hours into learning)

If you mean CAD, I found that FreeCAD works nicely as a parametric 3D modeler with some nice macros and addons, with the perk of also running on Linux

E: added info