Traveling Kerala with my family we are five people

Namaskaram my name is Seema I ma from Delhi guys can you please suggest me places in kerala to visit and also I will stay there least 18 days our arrival will be this Feb 5 and I really wanna enjoy the culture, traditional places with cuisine guys can you suggest like which place I should start I want to visit whole Kerala in 18 days how many days I should stay in each district to cover all Kerala and we have back flight from kasaragod thanks in advance