I wish it were that simple, but it isn't. You see, Frankfurt has multiple options to get from Point A to Point B, and the signs are electronic and changeable based on flow. So for example when there is a bottleneck at one set of passport controls, the signs will be changed to reroute passengers to another passport control (for example). I have flown through this airport my entire life and have absolutely ZERO sense of where anything is--unusual for me. But I have never had trouble getting where I needed to be because I simply followed the signs. I would say don't let yourself be intimidated because a) the crowd from your flight will be headed toward immigration (passport control) and then split into baggage claim / exit vs. connecting flights, and b) the signs will be giving you the fastest (if not most direct) route. Oh, and c) people in Germany may not LOOK approachable and helpful, but they actually are and speak excellent English. Don't be afraid to ask if you don't see any signs.