Build Your Roblox House
Referencing your drawing, you will build your house in Roblox Studio.
To get Roblox Studio, go to this link- ROBLOX STUDIO – and download the program. It is the white button with START CREATING on it.
Watch this video on how to build your house.
Upload a screenshot of the house where you can see that you have all of your walls, doors, and windows complete.