You would probably get more help over on the discussions side. From the pics it looks like all wainscoting in there. Where exactly are you painting?

That's really a nice room. So much to love about it, including the windows we can't see on the other walls. I agree with colourhappy's point about negative space, and also with those who feel for other reasons that nothing is needed in the high spaces. The first and third photos posted by Rebeccamom123 illustrate keeping attention down in the levels people occupy. But those rooms benefit from a unified upper line defined by the architecture that you currently don't have. Rebeccamom123's middle photo shows wonderfully that that isn't the only way to a beautiful space, but this design is far more complex and required some talent. And I think yours also requires a little talent and training to make it look good. That TV placement may be necessary, but to me it creates a really significant visual problem. Since you're adding a mantle, etc., perhaps consider hiring a good designer to pull it all together? For instance, just because the TV support and lines come out at that point doesn't mean the TV itself couldn't be moved down (and sideways?) to a better position, adding architectural detail to disguise as needed. (Btw, strictly in the interest of feedback, one of those corner side walls looks big enough for your TV, or next size down, and I'd almost certainly have put it there. If it needs to be on the end wall to be seen from the dining and/or kitchen areas, and a TV in the kitchen's out of the question, of course that's the place.)

We need a little more info but first IMO you need some sort of heat and light blocking so solar shades would be a nice choice and a floor plan with as much detail as possible like the measurements of all the spaces and doorways for sure . Is the sofa staying, is that a good indication of your style. Some pics of the other spaces in the home would be helpful

Hi Preeti, your home is so well maintained and I am sure the sunroom is a great space. Your best bet is to plan for successive blooms. Given water restrictions, native plants might be a good option. If there is a native nursery in your area, they will likely be happy to help. I found a few suggestions, but lack personal experience with these plants, so please confirm with a nursery pro. California Fuschia (Zauschneria californica) Epilobium canum. A very hardy native that can take a lot of abuse, this is commonly found in dry areas, rocky slopes and cliffs. Abundant, scarlet tubular flowers from July to November, popular with hummingbirds. Likes sun to partial sun exposure, may be used as a ground cover. 2’h x 4’ attracts humming birds Matilija Poppy (Romneya coulteri) bit tricky to get established, but is worth the effort. It requires excellent drainage and lots of sun. Large 4-6” crinkled flowers appear from spring to summer. Spreads by underground rhizomes. 3-5’h x 8’+w Desert or Apricot Mallow (Sphaeralcea ambigua)hardy evergreen perennial, this plant has coral flowers clustered on stems spring to fall. Prefers dry winters and benefits from pruning after it blooms. 3’h x 3’w Panamint Beard Penstemon (Penstemon floridus) A large showy perennial, this plant combines coarsely serrated to smooth leaves with hot pink flowers atop tall spikes. Prefers hot, dry summers and cold winters. 3-4’h x 3’w Mexican Bush Sage (Salvia leucantha) This plant displays long purple spikes in summer and fall that gracefully arch above grayish green foliage. Will take some light shade. Keep tidy and attractive by cutting old stems off at the ground. 3’h x 4’w