Right now a good time to install bc baby can come any time now! Its better to be safe than worrying about it later. While ur at it dont forget to have your hospital bag ready too
I would do it right away. I put it off and my son came early so it was extra stress trying to figure it out last minute.
I would call where ever you are planing to go and ask them if and when they do them. They may require you to have an appointment or they may just have special carseat events when they do them. My husband always just does ours while I am in the hospital.