Hey! Welcome to the forum. It is a lot of info at once, but once you start going through it, it gets better. I felt really overhelmed too. OOT bags are out of town bags, usually give to your guests at the resort to say thank you for coming. Contains small things, or not. You can out anything in it. You should look through Sandals website and there are some reviews here, read it and decide what you want. Most of the brides go with Beautiful Beginnings package and do some add ons on it. This is what I am doing myself. Also if you would like to spend more, go with the look you want. Just remember that they charge you for everything. I was afraid to talk to my WC haha, cause everytime I would open my mouth, it would cost me more and more lol.
I am sure you will figure it out, just go with the theme you like and go from there! Good Luck! and Happy Planning!