Hello derryck,
Learning martial arts via a book or video or the internet is not easy, though not impossible.
The first place to look could be Youtube, and typing 'self defense' or 'martial arts' or whatever style you are looking for (karate, tae kwon do, judo....).
There might be some tutorials there, there are some good ones on Krav Maga (you could try typing that in).
While I do understand money is an issue (it is for most of us these days), it is still advisable to learn martial arts under a qualified instructor for a number of reasons.
You could also Google for what I just mentioned regarding Youtube, and see what you come up with.
Another good idea might be to search some ebok sites, where youy might be able to find some free ebooks on martial arts.
Let me know whereabouts on this planet you live and depending on where that is I might be able to advise you slightly further.
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