@Yanike- (almost) everyone here is telling you the same thing, get a trainer/instructor, and don't condition by yourself. You're response is that no one near you knows how to teach well, using bad yellow and purple belts as proof. How were the people that were higher ranks, were they struggling as much as yellow and purple belts? Those people are still beginners, so it's completely possible that if you are more talented, even if they have good instruction, you can catch on quicker than they can. Also, there may very well be someone near you who knows how to teach well. If you tell us where you live, there is a VERY good chance someone here at least knows a good teacher in that area, or possibly are an instructor/student in the same area as you. You could solve all the problems the other posters have been pointing out just by telling us where you live, so we can help you find a good instructor.