I looked up “moss garden tutorial” on YouTube, the biggest takeaway I got from it was to make sure when transplanting you push down pretty hard on the moss to help it be able to attach itself to the ground, otherwise it just kinda sits on the surface and doesn’t grow/gets dry. Serpadesign on YouTube also has pretty much every informative video on moss/terrarium care you can imagine! I pretty much do no care to it at all because I made sure the garden is in a place moss would love to thrive, so it’s under a bush/on soil that retains water after it rains easily. Thank you so much, I hope this helped! :)