I'm not sure if what I will say will be 100% helpful but I can share my experience.
When I transitioned a long time ago I didn't know terminology or anything but I did things that would keep my hands out of my hair. I stopped relaxing immediately and just braided it and kept it oiled and such. Then I BC'ed after 6 months. I think anything that will help with low manipulation and a healthy scalp will help you in your transition!
Congrats on the decision!