I don't think anything is "hard" to keep. Once you have your system down and able to maintain correct/stable paramenters, they all will grow.
For a new SPS keeper, I recommend you do some research on what system you wanted to use with your reef. Once you have all the paramenters in line, you can just stock as you go. Start slow and don't make the mistake of overstock your tank with frags... I did that myself.
Dip all your frags and look out for bugs.

That can ruin your day if you don't know how to deal with it.
Good luck!