Only the viewing possibilities I don't seem to get right. My model seems to fly away as soon as I use the hover button,
the software has collision detection. You'll have to set geometry to be solid before you can walk on it. this is done in the objects drop down menu.
without my mouse reacting to anything. So not sure yet.
with the mouse you click once on the screen to use the mouse as your head. then click again to stop using mouse as your head.