Hey, anyone laughing at you needs a slap upside the head! The first time for trying something new is usually daunting and sometimes downright scary.
The good news is that I think Amazon makes ordering pretty easy, and it isn't finalized until you say it is. For next time, you go to the button that says "Add to Shopping Cart", then you will be led through the free registering process. I don't remember it exactly, but I think they make it pretty explanatory. When done with that and done shopping you click on the shopping cart icon at the top of the page that says "view shopping cart", and have your credit card handy. They may have an 800 number for those who don't like to do their credit card online, I'm not sure if they do or not. I think it is pretty dang safe to use credit cards though. I had a co-worker at store that recorded people's credit card numbers and used them himself. So, I feel safer using it online than I do at a store or restaurant.