Hmm..really depends how old you are. If you are really serious about it....join a MMA gym and learn as much as you can from BJJ, Muay Thai, Boxing etc.. A.S.A.P. Hope you're not 16 or 17 becuase if your goal is to join UFC by 20...dream on, not saying your dream will be crushed but...first, you got to fight in small shows and have a decent record. You have to have a lot of experience then you send your tape showcasing all your skills to the UFC and they review, and if they think your worth it, you have your Debut. Remember you got to make sure that this is what you want. If you are serious about it, this will be your life.