What an improvement from your first to second drawings! You solved so many of your initial issues.
Your more recent questions are trickier to write out, so I did a draw-over. (No doubt one of your peers could have done exactly the same. I'm just avoiding my actual work this morning)
And for it to look realistic how do I choose the picture frame, just what feels right to me I guess?
Yep. That's how I do it. Of course as soon as you put a frame on the image you will run into the fact that you can "magically" see the back of the bookcase and toy chest. If the viewer/camera is actually inside the room this would be impossible. So I simply moved those elements back such that only the tops were showing. You can call this a "cheat" or a "trick" if you like. But it something that a viewer of your image won't notice one bit.
I’m just wondering how would I do draw an open door in Perspective and the clock to make look 3D as well?
@NessIllustration suggestion of drawing an ellipse on the floor would certainly work. Please give it a try!
I typically pick a new vanishing point on the horizon line and draw a rectangular plane (the door) tracking to the new VP. This concept is discussed in Section 4 of the class video series. As for the clock, to give it dimension, I would simply repeat the ellipse you already have, but shifted slightly to the left of the one mounted on the wall.
Really well done!