Ours are indoors now. You have some great info already.
We have experience with French angora and thriantas.
24 square feet will be absolute minimum for 2 small lops, so I would go up some if you can. A walk in bunny barn would be most ideal for cleaning.
If you are getting 2, I would get two bucks and get them neutered unless you plan on breeding, in which case you will still want separate housing. I would not suggest breeding until you are WELL acquainted with rabbits because they are harder (in my opinion) to breed successfully than other animals.
Does are typically on the spectrum of skittish/standoffish to downright mean. If you get nice does, that's excellent, but once they reach maturity, their sweet disposition can change overnight. They can get territorial if not spayed or bred.
Bucks are just sweeter and more inquisitive, but they will fight each other if left intact. Outdoor rabbits are generally- not always- less friendly than an indoor rabbit, but they all have their own personalities and bonded bunnies are more forgiving than strangers.
Pine is fine for building housing, but outdoors it will break down fairly quickly, so keep an eye on it after it has been a few years. Rabbits can chew through rotted pine in about 5 minutes.

Less if they see something fun on the other side.
Pine bedding/litter is fine of it is pelleted, compressed pine. That's what we use for litter now because it tends to stink less and it's easily composed. It has minimal to no dust, so it doesn't cause the problems that shavings do. If they're outside and you have them on wire, obviously you won't need to worry about that, but I thought I would mention it.
I highly recommend rabbits. They are a joy to have. They require a lot of work and too many people expect them to act like dogs or something, but raising them is a rewarding experience.
Good luck!