Welcome!. Reloading is the most satisfying aspect of my shooting hobby that sometimes I don't know if I reload to shoot or shoot to reload. I would think a 6' bench may not be long enough for rifle work (my 7' bench gets pretty crowded when I have my Swedish Mauser on a rest cleaning it). Six feet will be good for reloading if you use a 'bench plate" so the press can be removed. But then again, every bench I've owned (even the 16' benches at work) eventually get covered
RCBS single stage is a great way to start reloading, and you prolly will be using it for the rest of your reloading career. If the out put isn't enough then look at other style presses (turret, H-style, progressive), but batch loading and with practice I was able to stuff 100 per hour when I was using a lot of ammo...
Go slow, Be safe and enjoy!