Word of caution, actually two statements:jester::
1. Mushrooms are very evasive and will grow everywhere, chocking out many other corals. Keep them in an area separate, like a little live rock island, such that you can control where they grow.
2. Mushrooms are addictive, the more you get the more you want.
Most of them are fairly hardy and easy to grow, just stay away from Yuma and Florida Rics in the beginning. Also, keep them towards the bottom of the tank with low to moderate flow. And post pictures.