If you do decide to adopt another bunny, make sure that it’s because you want another bunny, not because you think Apollo needs a friend. You’re right that they can do quite well on their own, but having two bonded bunnies can be delightful.
It’s great that you’ve thought about supplies and housing. However, especially since you still live with your parents, keep in mind what long-term plans you have for taking care of Apollo and your potential second bunny, in case of events like moving for school, etc. Aside from these considerations, I find that having a bonded pair (after the work of bonding) isn’t really that much more work than having a single bunny, though it is more expensive.
Another thing to think about: do you know where you would look for another bunny? Though I’d like to say that most pairs can be bonded with more or less work depending on the bunnies involved, there are definitely people who adopt a second bunny with plans to have a bonded pair, but end up housing their bunnies separately indefinitely because they just do not get along. Adopting an already spayed/neutered adult from a shelter can definitely minimize the chances of this happening.