Introducing new dogs

Question
Hello and thanks in advance for answering my questions.  I have always been a dog lover and have always wanted to have multiple dogs.  I currently have a Chihuahua (male) and I want to get a french bulldog as well as an English bulldog.  I am planning on getting the french bulldog this evening and the English in about a month when the litter is born.  My question is, A. How do I introduce them (I'm thinking I should introduce them on common ground, such as a park or something as opposed to my house where my current dog may become territorial)  B. Is it best to have all males?  I'm thinking that they would get along better if they are all the same sex.  Just so you know, my current dog has not been around a lot of other dogs growing up either, he is currently 5 years old.  Thanks again.

Answer
I am sorry I am running behind.  Too late now for most of your question.  If the new dog was a puppy, I would have said skip the park.  Bad place for a puppy, too much chance of exposure to disease.  A puppy needs to acknowledge the older dog's higher rank and not challenge it, submitting to it in its territory.  Trouble could develop over the next 3 years as the puppy matures.  If both dogs have a high drive for dominance, the puppy may refuse to submit to the older dog as it matures.  With 2 dogs, the best thing is a male and female.  If you now have 2 males, I would make the third dog a female.