Forget your mother moila. She obviously doesn't love you. Go for your dream - why bother with second best like fish and little baby rabbit. Get a dolphin. You can keep it in the bathtub.
Buying one is going to be impossible as all those selfish people who already own dolphins like zoos won't want you to have one in your flat. They are just being selfish - they are having to give up their dolphins because stupid scientists say it is cruel to keep dolphins in captivity at all. What do scientists know?
So you'll have to catch one yourself. Sometimes there are dolphins off the coast of Ireland and Cormwall (do you know where Ireland and Cornwall are? If not it might be easier to get an aeroplane to Japan where there are also dolphins)
When there you will need a boat and some bait. They eat fish, so obviously a McDonald's Fillet-o-fish would be the best thing to use. If you can't speak to people, chartering a boat might be upsetting for you, so buy an inflatable dingy from one of those seaside gift shops.
Then just set out to sea in your dingy with your fillet-o-fish and wait. It might take some time, but this is your dream. Never give up