Contrary to its name, this large paddle-leaved plant won't actually produce any delicious bananas but can grow up to 3 metres tall. In the wild, it grows Cavendish bananas, the world's most popular banana variety.
Banana Plants prefer bright, direct light. Give them at least 4-6 hours of full sun as they would if they were in their native tropical habitat.
Tropical plants like banana plants or Birds of Paradise have evolved split leaves in response to high winds and heavy rainfall in their natural habitat. Split leaves are completely natural and will not hurt the plant.
Brown patches on your banana plant are completely normal and are a characteristic of younger plants. It will disappear as the plant matures.