
Seeing that your girl is still only a puppy you have got plenty of time to read up about your choosen breed. First off get yourself the book of the bitch as this will help care for your bitch in general as well as give advice on breeding. Try and find breed books as these normally have sections on breeding, its no good just buying one book on breeding as you need to know what percific promlems pugs may have when mating, whelping and so on. Phone the breeder of your pug and see if she will help you and mentor you as its not as easy as one may think, especially the first time, on my first litter I had read lots of books and spoke to lots of breeders and even had a friend who had whelped lots of bitches and who is very knowledgable to be my mentor, but due to my inexperience we lost 3 pups :( I have learned so much more and have never lost anymore but this does not mean things can't go wrong.
You say your bitch is 6 months old, why not take her to ring class and get her in the show ring, a bitch that has done well in the show ring will get the attention of the right people and you may have home for pups before you breed, I don't breed unless I have at least 3/4 people waiting for pups. By showing her, and if you do well (and I don't mean just winning the odd class) then you will know that she is of good standard.
Also please find out what health test pugs need as people will like to see that the parents are healthy and this means more than just a check up at the vets. Also make sure that your bitch has not got any endorsements on her as if she has you will not be able to register the pups. If she has got endorsments then you need to speak to the breeder about what you need to do to get them lifted, but please beware that some breeder won't lift them as they may think that she is not good enough to breed from, along with other issues.
And just one more thing to add, please do not breed because you think that you can make some money, pugs are expensive because they often have to have ceasers adn have to be hand reared, there is a lot of heart ache in breeding as well as enjoyment. My last litter cost me £1,500 to rear and that is exactly what I got back, my only profit is still with me as I fell in love with him (even though I wanted to keep a bitch!!!)
Anyway I have ran on enough but I have only touch the surface on the things you need to consider before you breed, but I wish you all the luck, and know we all had to start somewhere, but please for your bitches sake, start the way you mean to go on. :)
Kerry