Welcome lula,
You will get all sorts of assistance from this forum on any topic you need help on.
Loading your kayak can be a daunting task dependant on your vehicle, vehicle height, rack system and your physical height can play a role as well. Rack systems can go from simple pads on factory bars to elaborate and expensive racks and rack mounted carriers costing in the hundreds of dollars.
Having a single kayak .. simple roof or roof rack pads are the least expensive and you can place a towel or blanket on the back of the vehicle then place the nose of your kayak onto the roof and slide the yak up onto the pads from the rear of the vehicle. I have a Thule rack system with 65" bars and slide 2 revolutions up from rear of my Xterra up onto the pads.
I will suggest that you add a carry handle behind your seat as others had posted here and that will give you a tremendous advantage in portaging your kayak by gripping the carry handle and slipping your hand through the Mirage Drive well. You can then hold the handle behind the seat and the carry handle at the rudder to help guide it onto the roof. You then then flip it over if you carry it upside down or leave it upright. I carry mine upright.

The Rack & Roll is a great tool but not sure if sold in the U.S. If you have a Thule rack system added to your factory rack you can get the outrigger that does the same thing.
http://www.thule.com/en/US/Products/Wat ... 16192.aspxBear in mind any extender only works if noone is parked next to you and you can get your kayak alongside the vehicle.
Revo