They're adorable! Do you know what genders? If they're male and female, you'll want to separate them at 3 months to prevent pregnancy. And to prevent any fighting its important to get them both fixed.
Do you have a litter box? Now is the perfect time to start litter training. They'll need a nice larger cat sized box for both of them and hay to fit into. Avoid cat litter, it has clay which can be fatal is ingested.
Removing the bedding all together will help with litter training. What is their setup currently like? Solid floors with a rug for traction cleaner and more cost effective.
Once they grow older, will they be outside full time? While supervised outside time is great, there any many risks with housing them outdoors. Predators being one of them. And without plenty of predator proofing, a tractor would be easy to get into. There's also the issue of space, heat, and being separated from you.
I have some additional information on the subject here too
Congratulations on becoming a bunny parent!