Hello @roxane, thanks for reading my post! When I was 18 I went on a Vipassana silent retreat for 5 days and wasn't really able to integrate it very well. Maybe I was too young, or maybe it was the time in my life or perhaps I needed a more individual teacher, but then later at age 25 I learned Transcendental Meditation which has been a good practice for me. However, there are so many different kinds and they are all good in different ways, I suppose we just have to find what resonates with us.
If you are inclined to try it, you might try using an app like 10%happier or headspace or one of the many meditation apps to see if there is a style you prefer to begin with. Or maybe take a class or join a group? I say all of this because I think good support is very helpful in the beginning. If I can help in any way please don't hesitate to reach out!