First off, welcome to apc! Let me suggest some reading for you to get your feet wet:
http://www.aquatic-plants.org/articles/basics/pages/index.html
http://www.rexgrigg.com/
Those will give you some general info on what's needed to grow healthy plants. Mosses are typically anchored to something in the tank for growth, wood and rocks being the main items. There are a lot of mosses out there. Typically attached with cotton thread, fishing line, etc.
http://www.aquatic-plants.org/articles/basics/pages/index.html
http://www.rexgrigg.com/
Those will give you some general info on what's needed to grow healthy plants. Mosses are typically anchored to something in the tank for growth, wood and rocks being the main items. There are a lot of mosses out there. Typically attached with cotton thread, fishing line, etc.