If everything is ok with your installation, you might try the following shortcuts;
F3 to go to the 3D window
F2 to return
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if you have the navigator open (usually placed on the right side of the screen) you can navigate using the buttons at the top
to;
1) Model view = model work environment and there is a 3D option in the list
2) View Sets = the views that are saved from the model with their specific settings, your rendered 3D view might be there with the specific settings
3) layout View = were you see the views from 2 placed on drawing sheets.
Double clicking on any item in those list will open the appropriate window.
HTH
Eduardo Rolón AIA NCARB
AC27 US/INT -> AC08Macbook Pro M1 Max 64GB ram, OS X 10.XX latest
another Moderator