Hi, I'm just starting too. But I can tell you, dropshipping is where the customer purchases the product off you on, for example eBay, and then you contact the supplier, pay them and the product is shipped straight to the bidders door.
Wholesale means you will get it for cost price but you may have to set up an account with the supplier and buy the product first, get it shipped to your house, before you can ship it to the bidder.