Great job buddy! Keep on doing it! Keep stuttering. Keep forcing it out. and don't let yourself back down! I was also an ambitious student like your; being a stutterer, I forced myself to join a debate competition, run an election as a student president, etc. It will make a positive return in the long run, at least in my case. Because why? you need a change to make a change. Just like when you force your body to do a marathon, for example, our brain is also intelligent enough to force us to provide the ability necessary. It's intuitive. Scientifically, the neurons will build some kinda path to provide you with the ability and close the discrepancy of your speech skills, just like you when we pick up a new language or musical instrument. Once again, great job!