I have at least 25 50mm lenses so I certainly don't advocate limiting yourself or depending on one look, but for a first/only lens I think you will be much more satisfied with a less limiting lens... something capable of results that don't beg the question, "which lens did you take these with" (because they obviously weren't shot with anything modern).
If you really want to avoid anything from Canon, CV, Leica etc., I would really suggest getting the Industar-61 L/D first... then move on to the more "distinctive" vintage lenses. Stopped down a bit the I-61 L/D is very respectible even when compared to modern lenses costing much more.
For meters I have given in to the little Sekonic Twinmate-II... very pleasing retro look (looks better next to a Leica than the Gossen digi meters to my eye)... if you want to stick with something FSU to go with your lens, I have a Leningrad-8 meter which is very accurate and sensitive enough for ISO 400-800 easily... haven't been so lucky with the Leningrad I or II's, but they are prettier.
Honestly, you don't need a meter though... outdoors, Sunny-16 works great and if you get to recognize a few inside EV's you will do very well... I find this more enjoyable than fooling with meters... and I end up going with my guesses over the meter most of the time anyway...
Get the I-22 and not a I/FED-50 because all the I-22's are clocked for a Leica camera, but many (all?) I/FED-50's are clocked wrong and are a pain to focus on your IIIc (might even hit your RF ring... I forget, but you don't want one). the best thing about the I-22 is that the camera will really fit in your pocket with it attached. With the faster collapsibles they are still kind of big.
Make sure you get a lens cap for anything you have! If you are new to RF's, unlike SLR's, there is nothing to protect your curtains from light, so even just sitting on a shelf with light coming in the lens you will burn holes in your curtains... if you can't find a lens with the cap, bakelite caps for I-22/Elmar etc. can be had for a few dollars from Russia.
I try not to restrict myself to just one look. That's why I use different lens depending on what "look" I'm after at the moment..
I also plan to buy a Russian fake Elmar lens to see what it will give..