I've just started on My First Dollhouse, the lily. I'm stuck. I don't know whether to paint, to glue, or how to proceed. I've painted and assembled my doors. And my windows. The next instructions asked me to glue the window casings to the walls. I don't know if I should paint the walls first. This is proving a daunting process and I don't want to mess it up, partly due to my OCD. LOL. Could someone help?