Best way is to do one or more of the below:
- get a mentor
- go to shows to watch and ask questions
- take classes
- get a show lead and collar and start working with the dog at home
learn about the standard and what the judges are looking for:
American Pit Bull Terrier Network Pit Bull Encyclopedia A to Z about the APBT
LOL now that being said, when I started, I bought a show lead and collar, registered and did it having no clue what the heck I was doing. I had fun and others there were helpful when I asked questions. Probably not the best way but that is what I did.