Cookieluvr4

I am booking my cruise on the Carnival Liberty and I have decided on an ocean view room. I was wondering whether I should choose a room on the main deck or the second deck? I was worried about the noise from the third deck but then I didn't know if there would be a lot of noise from the ship itself underneath the first/main deck. I know I want near the middle of the ship but how far from the elevators would I need to be to avoid noise or the crews quarters. Trying to find a numbered sections I would be happy in. Thank you in advance.

This is my first cruise and I was wondering if money is a concern, but I do want to make the most of my cruise, should I spend the extra on the balcony or save it for an excursion? I read the reviews about seasickness and since I don't know if I will get it or not, I was concerned about staying on the 7th deck opposed to the 1st or 2nd. Any advice? I do plan on trying for a room in the middle of the ship vs one of the ends and I will try and avoid elevators and crew sections. I know the 7th deck has people above and below so no worries about pools or clubs correct? Thanks for responses in advance.