Hi & welcome to the forums Congrats on getting the BH, she was my first build. I worked on mine for around a year but was worth it, it can be time consuming and difficult at times, but I think you'll do just fine Good luck...you can do it
Birdhouse is done for the most part, I found some little plastic birds at local hobby store, and painted them all. There are 50 of them. Now I have to put the base on & glue to the house.
I left my orchid an open floor plan, so far no sagging. I also didn't use the stairs, I made a ladder. In my Laurel I made faux pull down stairs to the 3rd floor. I also didn't like the windows, I bought new ones.