Yes, I did but for the wrong motive. Back when I was a senior in high school, I need some skills to keep the bullying juniors off my back. It helped until I took someone's teeth out and the club got to hear about it (under the rules, we are not suppose to fight outside except on extreme case of self defence). The club didn't believe me that it was a case of self defence so I was suspended for four months, I never return again.
But it's not too late, am in a different city now and hope to start over again.