Just make sure theres no stones in with the beans, chaff doesnt hurt the grinder.
I dont think you got to second crack but thats ok, some coffee is better staying out of 2nd crack. You might try a long thin whisk to stir the beans. If youre having difficulty hearing the cracks, just go until you see a little sheen on the beans. This will be somewhere along rolling 2nd crack. You can at least see by sight that the roast is done, even if you cant quite hear it.
Congrats on your first roast as well. Were running out of roast maidens, time to move onto another village :P