Question 9 answered, I’ll use UE4 directly to make my house, I have a good and encouraging beginning. For the question 6 part b on how to open and close door, I have the time to find how so it’s answered. For the question 8, I think all I have to do in import the content of “Assets” and put it in my "Assets’ folder, do the same with the blueprint part, … and then, I’ll can put the character on my level, I’ll try this in a while today.