First... make sure you have housing for them. Build them out of GOOD cage wire (1/2 by 1 inch) DO NOT use hardwire or chicken wire. Neither is suitable for bunnies. Always, always, always, have ONE empty cage. You'll need that cage for illness, quarantine, and emergency bunnies. Get that cage empty again within 30 days.
As to the bunnies. Think about what you want to raise. Do you want generic meat rabbits (which is an excellent place to start) or to you want to raise pedigreed rabbits? there are pros and cons both ways. Generic meat rabbits can make for excellent meat rabbits, and are generally cheaper than pedigreed, and give you room to make mistakes without losing your shirt. It also gives you time to suss out what pedigreed rabbits you might want to raise and where to find them. Do realize there is ALOT of ignorance out there and many people will call anything white and larger than the 6 lbs a New Zealand. Learn how much a meat rabbit should weigh (8-15 lbs), look at pictures online, and do the best you can.
That said, 6 lb meat bricks can provide a lot of meat.
Whether to get young stock or old depends on what is available to you. Regardless of what you get, ask a LOT of questions. If older stock ask why they are selling them, if they raised their litters, and how many kits survived to weaning. Check their teeth, for clean eyes, ears, and feet. Check genders (lots of pics on-line to help.
If young stock, check their liveliness, do they want to move, and when they move do they do so well? Check eyes, ears, teeth, and overall cleanliness... minding they are babies and sometimes they poop on each other. Check genders and realize that mistakes in gender happen frequently due to the Sex Change Fairy (this fairy is very real despite what folks might say). Some bunnies mature late, other bunnies have gender problems. Again, lots of pics on-line to help you out.
Food: Pellets are easiest, but many like to give additional feeds like veggies, weeds, hay, mixed grains etc. Others will feed things like that calf manna, cooked pumpkin, and papaya as well. Do some good research.
Rabbits ask for little in life: Shelter, clean water, and good food. They like to have extras like large places to run in but they aren't necessary for raising rabbits well. You need to figure out what you have in the ground you have. Bugs can live in the ground forever. For instance, around here I don't put my rabbits on the ground as then they'll get intestinal coccidia. It lives in the ground here I think.
You'll also need to consider predation. EVERYTHING eats bunnies. Rats, coons, possums, mink, foxes, coyotes, domesticated dogs, birds of prey, crows, weasel etc. And even if you live in town ALL those predators exist. Though perhaps not mink.
If you live in the country you'll have other predators to consider. Rabbits only defense is flight... and if they can't run and hide... they are food. It is up to YOU the owner to keep them safe. Think about it all ahead of time. Depending on where you live botfly and fly strike is something to be alert to as well.