30 w oil is fine. Chances are there is too much oil in the hub, good news is that if finds it's way out by itself. IMO I'd ride it for a while, the clicking and smooth shifting will return. My experience has been: If shifting from 1st to 2nd or 2nd to 3rd hangs up, it is more likely the cable, or the indicator chain, make sure they move freely. You can watch to see if the chain moves smoothly into the hub. If the hang up is from 3rd to 2nd or 2nd to 1st than it might be something within the hub.