Проверьте плизI want to tell you about my bedroom. My bedroom is cool. It is very big and there is a lot of furniture in it. My bedroom has got yellow and white walls.Но если не уверенны не отвечайте

Грамматически всё правильно.

Есть минус, много точек. Нужно ярче описать, убрать лишние знаки препинания.

Вот пример: Today i am going to tell you about mu bedroom, i like it very much, it's cool! There's a lot of furniture, for example:TV, big bed, sofa, a big bed. The walls are coloured with bright colors, yellow and white.

Можно звёздочку?