You cannot bond bunnies if only one is neutered. Both need neutering. The bonding protocol is the same for 2 males as it would be for any sex pairing – neuter both, allow hormones to disipate, pre bond for one month at least, start bonding sessions.

I’m pretty sure any two rabbits need to be spayed or neutered to be bonded, no matter the gender. Don’t rush things. Wait until Ollie is neutered and a couple of weeks later (to let the hormones die down) you can get another bun and start bonding. You could maybe get a rescue bun, they’re normally all fixed and vaccinated

Yes, you’ll need to keep them separate. Bunnies that aren’t bonded cannot be kept together.

Bunnies must always be kept separate until they are both neutered. There is no way round that. If you buy a baby, you have to commit to keeping them separate until the baby is old enough to be neutered, plus a month after the neuter, so you’re looking at least 4 months of keeping them separate.

Please remember babies need to be with their mothers until 8 weeks if you buy another baby.

I suggest saving up, neutering your bunny, and then think about getting a second bunny (who will also need to be neutered before any bonding can begin).

Don’t look at breed too much. Everyone really wants a lop at some point. Have a look around the shelter and see if one if them catch your eye. You would be giving a shelter bun a home and also freeing up space for another bun to be rescued. And at the same time saving money by getting a bun that’s already neutered and vaccined.