Importance of this bell aside, the building complex is well organized. The staff inside the bell building (mostly security at the metal detectors) is nice and quick. There’s plenty of information about the bell inside as you make your way towards it.
If you don’t want to wait in line (or prefer to not go through security), you can get a great look at the bell through the outside window near the exit of the building.
Note that going inside is free, but you can’t ring the bell. Would go again.