Hello Keira,
What do you need help on? I'll just throw out some maxims for the hobby in general if you have any specific questions feel free to ask.
Go slow, don't rush into it. If you're setting it up from scratch don't let it cycle and don't rush it. This maybe 4-6weeks of wait time.
While you're waiting, start looking at what livestock you want. If this is your first tank look at Xenia, GSP, and some types of polyps.
Make sure your rockwork is arranged so that flow can go completely around the structure. Don't let it sit up against the glass.
Add only a couple fish (of appropriate size) for your tank.
These may or may not have answered a question.
-Quah