Hi Ariel,
Congrats on your new bike, keep us informed on how you like it. That bike is on my wish list for when I upgrade. As far as clothing, you will really find that clothing does make a difference. The comfort and breathabilty of the material is wonderful. I do not wear underpants under my bike shorts. I was told that there would be too much bunching and cause irritation. There is so much padding that once you put the shorts on, you almost feel like you have a diaper on until you get used to it. At least I did. Now it is just second nature and I don't realize sometimes that I am even wearing them. After your clothing, if you can swing it, I would recommend the shoe/peddle clip system. It is unbelievable how your performance can improve on your bike with having your feet in one position instead of being all over on a platform peddle. It takes a little getting used to but I would recommend that system to anyone. My Dh just purchased his first bike in like 30 some years (he figured if he couldn't beat me, might as well join me), and the first thing on his list are gloves and shoes/peddles. I hope you enjoy your bike and good luck and welcome to the board. shelly