I've done my fair share of board/batten projects with my husband, Scott, by now but we have yet to work with beadboard and I really wanted this room to feel very feminine and feel like a room you would see in a victorian/craftsman home 100 years ago (but a little more modern). We just finished up a boy's room makeover for our son's who are now sharing a room, this was our youngest sons nursery, and that room has a dark green board/batten throughout; I wanted these two rooms to feel similar and that they belong next to each other but still have very different personalities and choosing to go with beadboard the same height as their board/batten really achieved my goal. (our sons room and this room are next to each other so you see them side by side in our hallway)
When I was researching how to do all the beadboard things I struggled to find a lot of truly helpful post describing areas like corners, top trim placement and painting. I hope I can help make your DIY beadboard install less stressful if this is your first time too. If you have any questions that I might have missed answering please leave a comment or find me on Instagram and message me.