1. PRESS ON THIS LINK
(from your phone):

https://www.whatsapp.com/download/

2. CLICK ON INSTALL
(look at the tutorial on the right) AND WAIT...

3. CLICK OPEN

4. CLICK AGREE AND CONTINUE

5. PUT YOUR MOBILE NUMBER IN, WITH PREFIX FROM YOUR CITY
(+44 UK)

6. CLICK NEXT

7. CLICK OK

8. YOU'LL RECEIVE A CODE NUMBER ON A MESSAGE, PUT THAT INTO THE SPACE. PUT 6 DIGIT CODE IN

9. WRITE YOUR NAME 

10. JOIN IN AND CONNECT!