Hello and welcome. Already answered you in your other thread, so we have “met” already
It’s a good thing to do a lot of research. I wish more people would do so. I think sometimes it comes as a huge surprise to new bunny owners that bunnies should be neutered and that it costs a lot of money. Also, it is a good idea to think how you will meet the bunny’s needs: bunnies have a strong social need – will you have two or do you think you can fulfill the need for another rabbit, which requires a lot of hours with the bunny? Will it be free-roaming in your room or do you plan to make a pen like a lot of people have made in here? Perhaps think about saving up already now so you can afford going to the vet once in a while and buy things for the bunny (take a look on the page about costs of bunnies). It is so sad to read posts where people for some reason cannot afford to go to a vet although the bunny is ill.
Oh, and read up on litter training
Regarding your dog then I know a lot of books on clicker training actually deals with introducing the dog to other animals, so read up on that as well.