Hello Angel,
Nixon has done 8 trips, soon to be 9, I have just booked my 14th and lots of us have done even more, so whichever trip you choose you'll find someone with the answer to your questions.
We were all nervous first time but look at us now, constantly on the look out for where we can go next.
Everyone is very friendly, just go throught he list of destinations, choose somewhere you'd like to go and prepare for a good time in good company.