Trio; i would not be surprised to hear that you had added the fish shortly after setting up your tank. As has been said in several replies BE PATIENT!!!! I know its had to do. Hang in there.
3 gallons a week water change is fine. If you get a lot of fish and put a heavier load on the tank, larger changes would be required. As phyl had said wait for the ich life cycle to pass before adding any more fish. Oh and by the way, yes damsels are hardy but be careful here or you'll end up with fish that you wish you could get rid of. Be patient and there are plenty of better fish for your set up.
I understand your concern about meeting strangers over the internet. Maybe getting your feet wet at a club meeting may be better for you. This would be a group setting and you would get to know a lot of people. Remember this is not just a bunch of internet people, or individuals, this is a club. And while we converse a lot here on reef central we have our own internet site and monthly meetings. We are an incorporated body (hooray - thanks phyl for making that happen) Our goal is to promote the hobby thru education. Even educating each other. And I must say that the people in this group will go out of their way to help.