Spike TV is a good bet, especially if you have some sort of DVR. They have The Ultimate Fighter show, but they also have UFC Unleashed, which is a show that replays memorable fights, and they will often replay UFC events that happened a few months prior. For example, I know the other weekend they replayed UFC 94 which happened at the end of January. I think this stuff usually airs on a Friday or Saturday night.
Spike also occasionally has live cards. The next one is The Ultimate Fighter Finale on June 30th. For a good site listing upcoming cards, and rumored fights, check out:
http://www.mmaweekly.com/rumors.asp
MMA Weekly also has top ten lists for each weight class, so you can get a good idea of who the top guys currently are.
Just keep plugging away at that stuff and you'll start to get a handle on it. Watching the PPVs also helps. If you don't have some buddies that want to pitch in for one, there's usually a lot of sports bars that will show the PPV.
If you need more help with anything more general like a fighter's history or specific techniques and strategies or whatever, you can also check out sites like Sherdog.com for their Fight Finder, Wikipedia is also a good resource, and people have posted tons of videos on YouTube, which is especially helpful in learning the various submissions and whatnot. And feel free to ask here.
There's a lot of people in the same boat here learning the sport.