Well, I checked the 75A fuse and those other big ones near the battery, and they all look good. Trying to figure out what to do next, if anyone has suggestions I am all ears.
*UPDATE* After much head scratching, and for lack of anything else to do, I rechecked all the fuses under the steering wheel. Fuse #25, which I just replaced, was burned out again! I put in another one, and it sparked a little bit on the way in, but for now things seem to be working! Very relieved! Not sure if I have to worry about it burning out on me over and over, but for now it looks like I will have a stereo on my commute tomorrow. Thanks Colin for your help - glad there are experts on here who can help a guy totally new to cars.