I like the furnitures in my home because they are very trendy.
I like the furniture in my home because it is very trendy.
My favourite furniture is my bed.
My favourite piece of furniture is my bed.
Furniture is an uncountable noun, so we cannot say furnitures or a furniture. We use a singular verb and singular pronouns: ‘The furniture is new. It looks very modern.’
To talk about one item, use a piece of furniture. For more than one, use pieces of furniture.