Inventor Fusion

[#1]

Hello folks, im very new to the software (1day) and I have encountered an issue I need help resolving.

So whenever I try and click on the insides of my design, I am now allowed and it only allows me to click on the top level.

As you can see in this picture below, the top level is turned yellow and the points are illustrated by green dots. I would like help removing the  yellow coloring and green dots so I am no longer locked out of the lower levels.

I also see that on my design there is a red dot (pointed out by red arrow), I think it may be some sort of center point as I remember it being there when I first started my design. I would like to know if it needs to be moved (and if so how?) because it is not in the centre of my design.

Thank you very much in advance! 

[#2]

In the browser tree to the left of the design, open the sketches folder and turn the sketch off. You should see a light bulb that is yellow indicating that that sketch is on or visible.