The first thing you should have before breeding is a plan for what to do with the offspring. Most likely, you cant keep them.
Finding a new home can be difficult, even if they weren't some mutts (all my rabbits are mutts, I don't care to breed for a special appearance, but for other traits, like health and character).
Don't be too sure that people who say "Sure, I would like a pet bunny" don't get wiser when it comes to actually taking on a 10 year responsibility, I wouldn't ask anyone to take a rabbit to do me a favour.
Although any rabbit is meat too, imho with this small breeds it isn't worth the bother, and I don't think you want to advertise free snake food on the internet.
Other than that, keeping records (of every breeding, maybe also behaviour changes, appetite...) got already mentioned. More Info helps later on - my does lose some appetite 1-2 days prior kindling.
Be ready to get up every other hour and check on her when she's due, it's not always smooth running with first timers, some are somewhat confused and get the the sequence wrong, like pulling the fur too late, or not going into the nestbox in time (or not staying there) etc.
Put aside some money for a vet visit, better to have it and not need it than the other way round.
Be sure to have enough space available to keep doe and buck, female and male kits apart. I keep the girls with mom, no problem, with bucks it's another thing after 8-12 weeks (depending on size/breed).
When sexing the kits, do it several times, and get a second opinion even when you think you are sure.
Just be sure what and why, since you've read up I don't think you're one of those who get this weird expression on their face whenever thinking about littly, fluffy baby bunnies
Edit: Yeah - making the cage baby bunny tight is good advise, they are small, and other than adults they can climb pretty well.
That "don't touch them" is a myth though, maybe true for hares or deer, but rabbits absolutly don't care if you handle the kits. Well, at least they don't care the smell, some might protect the nest aggressivly, simple put those out of sight while handling the kits. But check the nest asap and put any kits that are not in there in.