Before I began breeding chins I read through all of the FAQ's on here and 90% of the old threads in this breeding section. Trust me almost every question imaginable has been asked in here and so reading them helped me learn a lot.
Tips:
1: Read, read, read
2: Go to a show, make breeder friends, there are things you learn in person that can't be taught online.
3: Save up 1000$ and know your chin vets that do surgery. ASK the vet, many will see a chin but won't do c-sections. My girls first litter ended up a disaster, it was saturday and the vet I had researched was not a 24 hour one. It took me almost 3 hours (which could have made the difference in life or death) to find one that had emergency hours AND did chinchillas. So do that well before due dates! Also, then you can ask the price ahead of time to know what to save up.
My first litter cost 1300$ after everything, 800 for spay and 500 for complications in the next few weeks, I was lucky that my female survived (spay) and 1 kit made it.