Ok take a breath,, hold it and exhale slowly.. and again.. repeat...
you are way over stressing here... lunch at topsiders is a buffet, on few days it is themed (asian, italian what have you) but it is always posted outside the buffet. Or you can just walk through and check it out. If that does not look appealing you can go down to lumineres who has a menu posted for lunch each day ( I think parrot cay does also) Or you can get tacos, hamburgs, pizza, I think wraps , chicken nuggets etc at the places by the pool., Or get a great tuna sandwhich from room service (as well as other goodies) Lunch is just a non issue.
As for dinner, RELAX, I believe on the special theme nights topsiders has approx the same menu, can't really help you as we never ate there, just go with the flow and check it out when you arrive. There is so much more to the cruise than dinner! I really don't even think about it (except to figure out when I would do Palo) until the menu arrives, relax it is not a test it is your VACATION!!!!!
By the way did you catch queer eye for the straight guy yet? It was a rerun again last night. My DH almost peed his pants when I told him how you could measure your DH around the neck.. He laughed so hard we tried it and IT DOES WORK!!! Smile Barb a cruise is not something to stress about, it is to releave stress!