I have some questions regarding the ruby workspace. Is there a way to just create a blank workspace and manually install Ruby, RVM and Ruby on Rails, and be able to have multiple directories to create multiple apps? The default workspace is only for one Ruby on Rails project.
Yes, this is easily possible, you can just follow the install instructions for Ruby, RVM, and Rails on a blank workspace. Alternatively, just create a Ruby workspace, then create subfolders in it for each project.
Yes perfectly possible. I would suggest using the Blank template for this though.