Mainly mini lops and Hollands!
My advice is choose either mini-lops or holland lops, don't try to do two different breeds until you've mastered one. After you've mastered one breed if you are still coping with all the stress of taking care of all the bunnies and the cage cleaning, grooming, breeding, pet homing, culling, random unexpected vet bills, etc... and if you are still enjoying it, then start on a second breed.
I started a small rabbitry and my project was blue eyed white Jersey Woolies.
When I started I had read that a lot of people had 30 rabbits in their rabbitries, so I thought I could surely deal with having up to 18. But I was so wrong. I have 12 rabbits now and thats my limit, and I find it a bit stressful just having 12. One of them every week has some sort of issue I'm worried about, sometimes only small things, like what's that bald spot on Humphry? But some weeks its something big like Tulip is not pooing- oh no possible woodblock! So, with 12, every week there's something. I would be a lot happier I think if I had actually kept it down to around 6, but I am keeping my first breeding pairs- not culling, so I have 12.
... So really, my advice is try to keep it down to 6, breed less and enjoy it more without all the worries.