If you aren't going to start off by taking lessons, get a basic video so that you have the very basic stuff down and then work on your ability to pick out tunes by ear. Get a metronome or drum machine and work on your sense of time. Electric metronmes can be bought relatively cheeply.
Also find a guitar player to practice with. It will make things much more fun, especially if he is better than you.
Good luck!
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HypnoBassMan
The deeper you go the better you feel! (True for bass and hypnosis.)