The foundation looks good so far! I would go for combining more materials with the brick one you’ve chosen as the main one. Like wood, marble and maybe some small concrete or slate details.
Try to go for more variety of shapes & colors, because It feels really boring and plain. Overall, the foundation looks pretty decent, I like it, but If you add carpets, colums, chandeliers, torches or any other light source, It makes the room look much more filled and colorful. I’m sure, you’re going to improve very soon, I see potential.
Keep it up, brother!