Am I able to provide a dropdown box of different options for my products?
With a possibility of like 100+ different options? Something where they can pick a specific of that product and add it to their cart.
Not 100, no. But you can increase the option fields for each product up to a maximum of 9 via Settings -> eShop -> General -> Product Options _> Options per product/ You might also want to explore eShop -> Option Sets.