When I was young I was very shy, painfully shy even into my early 20s. All social outings were family reunions or church.
But I liked computers. So in the early 1990s I bought a computer and tried this thing called the Internet.
By chance I discovered IRC. It was a world of strangers who interacted in real time. I could converse without facing or looking at a person. And at the time I used it for help when working on my PC so I'm a way it was forced interaction.
I've often thought if it wasnt for IRC and other Internet chat applications my life would be quite different. It helped crack my shell of shyness.
In a way you're right interacting with people is the key. But in my situation it was slightly different.