At first I too was intimidated, but I did what was recommended by those here, went slow, tested often and researched, researched and researched some more. As far as fish, I've had some down falls by losing 2 to Marine
ICH. But for my first fish I bought rather cheaply just in case of loss. I've since set up a small 3g
QT tank. I have learned sooo much about this hobby in such a short time all from listening, and doing what other successful
SW keepers were and are doing.
Start small but give it a try!!! It's so fun!!