That didn't turn out too bad :)

UV unwrapping can be a bit of a pain in the system, it's one of those things you just have to keep doing. The boxy shape that you have there would have actually been pretty easy to learn off, all you're doing is making seams which are like little cuts so that your model flattens out nicely.

Then into a painting program you go and paint your texture. I think some of them can connect to Blender so you can see what's going on live but it's been a long time since I worked like that, I just bought BPainter because it was easier.

Did you mess around with the scale of the procedural texture? Sometimes you have to make it surprisingly large or small to get the shape/pattern you want. Still not bad though :)