I agree with starting out with a female. It will take some time to get her to breeding weight. Also, look at your male pastel and look at other pics of pastels out there to see how he stacks up. If he's a real looker, you can get a nice female and have nice babies. If you look around and think he may not be exactly what you want to breed to a normal or fire, or mojave, etc., you can go get a real pretty female pastel and then produce some great pastel and super pastel offspring.
The nice thing about pastels is that they are a co-dominant gene and can produce some cool morphs. Some of my favorite pastel morphs are: fireflies - pastel x fire, super pastels - pastel x pastel, pastel x enchi, and pastel x woma. I have a fire female and would like to eventualy breed her to a super pastel for superflies
Good luck and have fun reading! As the folks above have said, there is a LOT to learn, but BP.net is a great place to dig in!