I had also tried meditation for years and never "groked" it. What ultimately helped me was using "One giant mind" app. It has 15 minute session for everyday. Doing it everyday for a week I didn't feel anything different but one weekend on a whim I decided to meditate using the app for 3 hrs straight and that's when I felt I finally got it.

Like others have said you can take help of teachers or try meditating in a group. Although I do feel because there so many choices available discovering what works for you may require a little bit luck too.