I live in Belgium and the closest Dojo's to my place propose Aikido, jujitsu and karate. I'm not a very sportive guy but willing to be, i'm very tall (6'5'') and quite thin. What would you recommend me? I'd like to start aikido but ju jitsu or karate also seem interesting... Should I just start and look after a while, do both at the same time... I'm waiting for your answers...