Forum:Help with deck!!!

I have been playing yu-gi-oh! for a couple of years now but I've never gotten serious about it. However recently I decided that I wanted to delve further in. I am entering my first tournament in a couple of weeks and am facing a huge problem. I don't have a deck. I have lots of cards from basically every series. I definitely have more old cards than new, though. If you could please help me that would be great. I would love a deck that would work with The Winged Dragon of Ra (I got the new legalized version in Shonen Jump)or basically anything else. Please help!!! and also please make most of the cards common, so there is a greater chance that I will have them. Thanks as always.