With all due respect, I don't know how to answer that question. If you have never tried to do these things before I'd advise against just diving in. Perhaps you could find someone who you trust, and who knows a bit about this subject, to give you a hand. On the one hand you want to learn how to do these kinds of things; on the other, the idea is to get it fixed without messing something up further (although this latter result has happened to all of us).