1) So, Joy, you started the Laugh to Live organisation in 2012.
2) Why did you start it?
3) What did you want to do?
4) I started Laugh to Live because I felt I had something I wanted to share with people. In my life I have lived and worked in four different countries, in four different continents, so I've had a lot of experience and I've worked with people from all over the world.
9) Years ago, when I travelled to Africa, I met poor children in the jungle who had nothing. But they had the biggest smiles I have ever seen.
12) I have used a few techniques to help people learn to laugh more often. And because they now laugh more, they have become happier people.
Времена Past Simple употребляются с конкретным завершённым временем в прошлом, например in 2012 и years ago. Present Perfect используется для жизненного опыта и действий с результатом в настоящем.