Welcome aboard, I think that you have made a very wise choice to join LPSG. I have been away from this site for a while. Since I'm back I realize how much I have missed it. This site is very diverse so you are going to find some topics that get you excited right off. There are other topics that will seem to be of less interest.
My advice is to be like the little kid in the candy store. Keep looking, drooling and then jump in and get involved. Now I'm going to stop drooling and and dive in. I hope that our paths cross again. I'm sticking around this time. (smile)