Osaka-ben is one of Japanese dialects mainly spoken in Osaka, my hometown. If you are a Japanese learner, I think you will start with the so-called "standard Japanese". No way! That's not cool at all! Learn the representative dialect of Japanese, and use it to local people in Osaka or all over Japan! Then you won't be a "gaijin (outsider)" any more, but you will be inside of the community!
I'm a part time language teacher (Osaka-ben and English), so if you would like to have me as your private tutor, message me on YouTube^^ If you are an English speaker and have language difficulties around Osaka, I can translate and such for you. So message me on YouTube in that case too!