Correção de texto: My greatest accomplishment

Hello people, I would be grateful for your help!!

I believe that I still have many great accomplishments in 18 years of my had many accomplishments that were important, but I still want to have many others.
At this point in my life I see as my greatest accomplishment is learn a foreign language, English, because learning English has changed my way of thinking and made me want to learn other foreign languages.
The Truth is that I always wanted to learn and understand English when I finally had that opportunity was really incredible.
Every day that it continues learning is becoming something more real and important in my life, I am very grateful to have got such an opportunity.
I hope to accomplish other goals in my life yet, but now I am pleased and proud to have managed this my accomplishment.