There is a lot conflicting information out there, especially for someone just starting off. I spent months reading about raw diets for cats before my cats ever tasted a bite of raw food. The best thing you can do is read everything you can find, and decide what will work for you and your pets. Do you want to do ground raw food (sometimes ground is easier to transition kibble addicts to right away, however it requires you purchase a grinder that can handle bones), or do you want to do franken prey or prey model (which is just chunks of meat and meaty bones following the ratio of 80% meat, 10ish% bone, 5% liver, and 5% some other organ).
I don't personally believe there's a 'right' or 'wrong' way to do a raw diet, it depends on the person/people and cat/s involved. Though I can pretty much guarantee that you're going to see a HUGE difference in your cats when you do start adding raw to their diet. I switched my two cats from poor quality kibble, to better quality kibble to canned and then to raw. I can tell you my older cat (who is 15 now) had amazing results. She's a different, much healthier cat these days.
One thing I don't believe is necessary are veggies in a raw diet. Cat's can't process vegetables, and vegetables have basically no nutritional value for an obligate carnivore. So don't pay any attention to ground recipes that tell you to add broccoli or spinach or garlic (garlic is supposedly toxic in high quantities - I think small quantities are supposed to be ok but I still don't see why cats would need it). Some recipes call for psyllium powder which can help relieve constipation. Maybe that is beneficial to some cats, but if a cat is constipated on a raw diet the first thing you should do is reduce the amount of bone they're getting. 10% bone is too much for some cats and can cause constipation.
The reason you see some ground raw food recipes calling for a taurine supplement is because grinding and freezing can destroy the taurine in meat. Taurine is vital to cats. When you are grinding and then freezing food some people feel more comfortable adding taurine to ensure their cats are getting enough. I feed my cats franken prey, and I don't feel I need to add any supplements to their diet. I do feed plenty of heart (which is high in taurine, as is any hard working muscle like chicken thigh). I do give my cats raw eggs about once a week though, and I know some people add egg yolks to ground raw food.
To you I'd suggest just trying something simple like chicken breast with all your cats. See if their interested in raw meat, and whether they're willing to chew chunks of meat or not. You can also try bones like chicken wings or quail. My older cat took a lot of work to convince her that she could eat bones, but the very first time I plopped a chicken wing in front of my younger cat she completely demolished it without hesitation.