Space, not a cage
A rabbit needs to move, jump and stand up: a small cage is a source of suffering. Go for a large enclosure or semi-freedom, with several hours of supervised time out each day in a secure space. Cables, plants and dangerous nooks must be protected.
Hay above all
Unlimited hay is the basis of its diet: it wears down its teeth (which grow continuously) and keeps its digestion working. Supplement with a variety of fresh vegetables and a small portion of quality pellets. Fresh water at all times; avoid bread, biscuits and too much fruit or carrots, which are too sugary.
An animal that needs company
A rabbit gets bored alone and often thrives in a pair (a neutered couple to avoid litters). Handle it gently, never lifting it by the ears or the skin, and respect its rhythm: it's through patience that you earn its trust.
The rabbit's health
Get it vaccinated (myxomatosis, hemorrhagic disease) and consider neutering, which benefits both health and behavior. Watch its teeth and digestion: a rabbit that stops eating or producing droppings is a veterinary emergency. Consult a vet who specializes in exotic pets.
Preparing for its arrival
Plan for a litter corner, reassuring hiding spots, hay, heavy bowls and something to gnaw on. Give it time to explore at its own pace before multiplying contact. A calm, stable environment makes all the difference in the first weeks.