Hey Halo:
I can attest, playing badly is not fun. I hadn't played for about 8 years before I strapped the pads back on. In my day I was a pretty good goalie then time warp.... I was crap

.
I essentially had to re-learn the position, but after about 4 months of play I was back at the level (now likely better) that I ever played.
Just keep going, work on your fundamentals. Don't be afraid to ask questions of the other goalies that you play with. I'm sure that they would be more than happy to help you and make helpful comments on visible flaws in your game.
Also, if you haven't done so yet take a look at the instructional PDF that Keeks has put together. It is written for ice hockey, but there are great general goaltending tips in there. Really cool resource.
I did a search for you. It turns out that another user (Nightfall) has been kind enough to host it. It is a big download if I remember correctly:
http://www.nightfall.net/goalie/
Good luck