What are some things I should add as decorations? I dont know where to start at all with decorating the entire house.
This build was inspired by: Feedback on my vibe game in space
Nice job, looks extremely realistic! But I think for the first image, you can (1.) make the grass stick out more to be above the pavement around it, or (2.) keep the grass the same and round the pavement a little, since it looks unnaturally blocky. Other than that, I would suggest making at least a second story for part of the house, since i think it looks a little small/ bare without another thing on it. Later, you could also make a swimming pool in the front or backyard to make it better.
You should add furniture! It would be cool to see what it would look like furnished. No house is finished without furniture (in my opinion). But otherwise it looks AMAZING! As a house builder myself, I have to say that I love your style, it looks very realistic!
I think your Modern House looks fantastic from exterior to interior as you have good details going all around, the doors are great and the lighting is good.