RockAndSage
WKR
Definitely worth it to at the very least take the time to research some of the survival techniques and even practice some of it.
Definitely - but there's no amount of book learning that will leave you sufficiently prepared without practice. Fortunately, practicing building a fire from scratch is one of the easiest things to do at home, even with just a cheap fire pit in the back yard. But things like trapping, hunting, skinning, water purification - never expect to be able to do any of this in an emergency if you haven't already done it to competence in practice.