1. Good luck! BUT
2. Your start is wrong:
- The background blueprint was made from the original and another program.
The accuracy is far to be acceptable.
- Your drawing is also not acceptable:
--the walls thickness, rooms, doors and windows size and opening and many other.
3. Avoid GIGO phenomenon: Garbage In, Garbage Out (Sound exactly the same in Romanian)
4. You have to consider and don't touch the structure walls.
5. You need also the actual dimensions as accuracy you can and then you could think to future modifications.