I just did some trip 35 repairs (replaced the filter ring + general cleaning), and taking off the top is quite easy. The website mentioned by Greyscale is a good guide. Don't let the shutter button go flying after you take off the top and you'll be able to see if the meter needle moves at all. If it doesn't, you might have a bad selenium cell or a broken wire/connection. If it does move, then go fish.
Lens disassembly isn't much worse, but there are several interlocks (? guessing that's what they're called) that need to be lined up for the barrel to function upon re-assembly. To replace the selenium cell, you need to cut the wire and solder the new one on, unless you want to take the entire barrel apart...
If you're confident with your repair skills, you could chance it with a parts camera having a working meter.