I think it would be fine to change the sand color to Olive Branch. If it's too much, it might be nice to select a lighter, color and consider making the paneling area above the fireplace this color. I agree the scale of the pictures is too small. I think it would be nice to anchor the dining area with a large painting. The bigger the better to fill some wall space. Right now, the furniture seems to be arbitrarily placed throughout the room so I think you should rethink the floor plan. I would place the sofas on either side of the fireplace. I would move the tv to the small wall and hope that it sits below the wall and doesn't stick out. Right now, it's fighting the natural focal point of the fireplace. Now, the concept of Spanish/ Mediterranean. When you continue this space, think heavy, think furniture. Contrast is important in this style so consider black wrought iron details, perhaps a wrought iron chandelier for over the dining table and some sconces for the living area. It might be nice to consider tapestries for the area. When I suggested a lighter color earlier, it might be appropriate to think a tan or an orangish hue that is found throughout this style.

I would start out with a large, beautiful rug in warm colors (terracotta or red Oriental rug mixed with other colors. I feel sectionals often confine you in how to organize your room. I would choose a fabric couch in a neutral, not too dark color (not gray, which is on its way out and not a warm color), and add two chairs in a different color or at least a different material and style. Try to keep the height of these pieces similar. Two end tables in wood (they don't have to be the same, but make sure the heights are fairly similar and a metal and glass coffee table would look great, with table lamps or floor lamps even if you have overhead lighting, which is always harsh. Pick colors from the rug for pillows and you'll have a beautifully coordinated living space. Books, good paintings and some tall plants will add warmth and personality to your room. People too often don't add these elements and then wonder why their rooms look bare and cold. This may be more colorful than you want to go. and this is a small rug because there is carpeting underneath, but it gives you the idea of neutral furniture and how it can be made more lively with accessories, pillows, coffee table styling etc.

I love that couch in your pic...that’s style I’m looking for. Idk if should get loveseat so more space and if I should do a cream color or very light gray. Plus, I just have no idea best way to arrange this. Thx you!

Sorry so many comments, internet slow and won't take a lot of pics at once. Walls Bittersweet stem, accent wall as above. I'd paint the door the wall color since you don't have trim around it. It looks unfinished in these pics. not sure these are the right colors but they give you the idea.