this gun sounds like a great place to start with English sxs. If it locks up soundley and the barrels aren't too thin, it will be fine for upland hunting but you should be using low pressure loads in 2 1/2" length if at all possible. For a newbie to doubles your research seems pretty well based.
Keep in mind the doubles market is fairly thin and many dealers don't even deal in them, so their valuations are way off. The pitting around the striker holes and reproofing might indicate it started life as a blackpowder proofed gun.
