The exterior door should be a slider to let in the maximum light. Perhaps the ceiling light in the sun room could be replaced with a ceiling fan with sunroom vibes.

Paint - the color needs to be much lighter.

1- The photos show a few of the tiles may be tilted. If that's the case, see if they can be fixed. If not, consider new tile or other new flooring.

2- Replace the old melon light fixture.

3. The paint should be a clean new off white in both sunroom and adjacent room.

We were thinking slider for exterior door for sure!! I should have added we are painting walls white :) Thank you!!!

I don't think you're asking about this, but the flooring change in the middle of the slider in your last picture is not a good look. Make sure when you choose a white for the sunroom it's not a cool white if the floor tile stays.