How can I become a great attacking midfielder?

Hi, i am a 17 year old boy from south africa and i wanna to become one of the all time greats african footballers. My dream is to become good enough to start for Fc barcelona. i have the talents but i just need a few clarifications. What should work on to be a great number 10 or attacking mid? i have great vision and creativity, can shoot with both feet, good accurate ping both long and short with both feet, fantastic Set pieces taker and can also defend. I have played every position in soccer and it has given a better tactical understanding of the game. I have a ingenious football brain thats probably my biggest quality. So i want to know what should i work on to succeed in this position and become like players like Deco, M.laudrup etc... At this stage should i focus more on my strengths or weaknesses? My stamina is a bit of a problem as it sometimes prevent me to perform to my full potential and limits my movements on the pitch. Please help and be specific in details