You can learn it very quickly, however, to become proficient it
will take years of practice. The basic moves can be learned in a
few weeks, but they will not allow one to be good enough to prevail
in a fight.
Knowledge is a journey, you know? We'll get there.
Chat with Steve
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There are quite a lot of online classes available (online of
course). You can also check out videos on YouTube. But I would
recommend to get a teacher with a minimum degree of 3rd Dan.
Learning karate on your own is not a good idea at all.