What kind of terrestrial moss was it? Some work better than others. The buttermilk works a LOT better than the beer, and organic yogurt works a lot better than buttermilk. It usually takes at least a few weeks for the moss to start growing in from paste. It helps to keep it in a cool, dark, damp location for the first couple of weeks. We would put our logs into a container with no lid filled with a shallow amount of water to keep humidity up.
Spraying the moss with "worm tea" (made from worm castings/poop) also helps to add beneficial microbes that help speed growth.
I'm NO expert but I do have some fair amount of experience with mosses, with trial-and-error.
Once the moss begins to grow in well, you can try submersing it entirely in fishtank water for an hour once or twice a week. It really helps to bring out lush, deep greens. We used to grow a little moss in the cup our betta fish came in, when we would do full water changes (way back when I had no idea how to care for them, he was in a 5g with no filter and so we'd fully change water weekly) we'd place him in some of his tank water in the cup, and when we were done we'd net him out and leave the water a bit longer in a windowsil. Believe it or not warm water will speed growth in established terrestrial mosses.
A plus side to this kind of start is that mosses grow in nice and evenly, but a downside is if you get two or more different kinds on accident they can look kind of patchy (which imo looks a lot more natural anyways.)
ere's an example of a bit of patchy moss application (this was a bug habitat)
Here is the moss I was talking about earlier, with the fish.
And this is what it generally tends to grow out like when prepared like you have it(We prepared this with yogurt, kept moist, and sprayed with worm tea once a week or less.)
It should actually grow out a lot more "even" for you, but sometimes creases or differences in level will appear especially with this method, as humidity and growth rates will range in small areas.