First and foremost welcome to the board. Now as far as Hudson Grotto..... DON'T OVER DIVE YOUR ABILITIES!!!!!!! It can be a great dive if you go with someone that has been there and you stay shallow. It gets really dark as you go deeper so beware. I enjoyed it when I went with EAN and I want to go do it again but I have been diving for a couple of years and have done night dives and just about every other dive I could find. I would say it is an Advanced Dive but if you go with an experienced diver that has been there you will probably be O.K.
What Ken said.....if every dive is within your training and comfort level it will be a great day.
See you Saturday.