need help in automation

i was thinking to send messages to particular whatsapp members indivisually.So the first thing i did was got added to a whatsapp group opened whatsapp in my browser by web.whatsapp then i by using a trick got all the numbers of the members in my excel sheet in just few clicks. so now by using web.whatsapp how can i automatically send indiviual whatsapp message to those people?i am stuck here please help

anybody who can help???how can i do this

In order to automate the web browser you have to use Selenium. Search for selenium tutorials online for your favourite Programming language - there's C#, Js, Python and more.