I dun think so but for confirmation u hv 2 ask the guppies who hv seen me in person 
It makes ur body very flexible and it teaches you Discipline and respect for others and it also gives you self confidence.
As far as the time it takes is concerned it depends on till what level you want to learn and how much u can train in a specific period. It took me 3 years and one broken toe to go from white belt to 3rd Dan Black Belt. After that I got lazy because to move forward in Black Belt Degree/Dan u hv to win the biannual championship competition 