hover over stuff to see if it is interactable. take your time, hovering over something for a few seconds will let you inspect it, providing a very brief description of how you can interact with it and/or what it is.
other than that there shouldnt be too much more you would need help on i think?
if you are stuck in an area, there is more than likely a way to get back to the previous page (normally somewhere on the bottom area of the box, or the left and right of the box).
oh and desktop browser + F11 (to fullscreen) for the best experience!