Creating collaboration Spaces online in the cloud

Is there ways for Cloud based (whiteboard? )(Meet on Google?) collaboration on a made for public access Art modeling projects

What do you have in mind?
Public for everyone? Or a select team?
3D Modeling is somewhat more difficult to implement than 2D text documents, like Google.
Trimble Connect is a cloud-based viewer, but not editing ‘real time’

Take a look at:

I was thinking of an art project I started and would like to see it finished with some help.
The Suggestion looks like the direction I was going. Sketch Up as a tool of therapy/Education for survivors Is a secondary goal, Thank you