Good work! The great thing about 1-point perspective is that as long as you're sticking with boxes, you can draw your lines with 100% confidence: every line is either completely vertical, completely horizontal, or radiating out from the vanishing point. If you're lost and wondering where a line should go, just remember that you are restricted to these 3 options. If you want to add a non-boxy element to your drawing (like an oval rug or a headboard), start with a bounding box first to capture its dimensions, then subtract from it to get the object you want. Looking at your image again I think you do a good job of following perspective. What's missing from your room is the room itself. This makes your furniture look like it's floating in space. If you choose to do the exercise again, watch the part of Stan's video where he builds the room itself, then start with establishing the back wall, side walls, ceiling, and floor. This is the foundation on which all of the other elements will rest.

The more I do this exercise, the more fun it becomes! I'm surprised because previous exercises frustrated me instantly, haha.