
I had my first litter not that long ago (my boy I kept is just over a hear and half now). For me it was books, breeders and showing.
I got a few books but the book of the bitch was the best of them and seemed to cover the most things. Read that cover to cover multiple times and during it all I kept flipping back to it when needed. I already knew some basics from my college courses but it's knowing the how to spot of that goes wrong and what to do stuff that was great.
Showing help teach me what my bitches faults were (they all have something that could be improved) and what her strengths were, so I had an idea on what I needed a stud to be strong in to match her.
Having your girls breeder on your side to be your mentor is a massive help. Mine told me which studs/lines I should avoid using and which would potentially be good matches. They helped my find studs and approach the ones we decided to use. Finding a stud wasn't all smooth sailing, in our breed its had to know who exists other than the few currently in the ring when your newer, and then you may pick a stud plan it all out then he fails an eye test just before. My breeder was also there to offer advice all along the way.
A friend also took a week off their work to come up when my girl was due, they have bred a few litters before and were happy to come stay up and lend a hand.
When I originally got my girl I had no plans to breed at all, in fact I wanted a male didn't want to deal with seasons but fate had other plans. After showing for over 2 years and doing all her very testing the topic of breeding came up with her breeder and once we decided to go ahead with the aim of hopefully getting a nice boy to keep I wanted to make sure I knew how it all should work, what things could go wrong at each stage, how would I spot them and what I should do about it if I saw signs something wasn't right. All that while spending ages trying to decide on what male to use, getting a waiting list so I had some homes lined up ready, and planning the logistics of it all.