Welcome to AA glad you found us here

I'm glad you decided to do your research first, your already one step ahead of most beginners

.. with that said don't let saltwater scare you off. If you want a clown fish there are all in one "plug n play" systems like biocubes which will make it much easier but with the proper research you could setup your own system to your liking. Remember everyone's a beginner at some point so you gotta just go for it, goodluck