1. understand the role of the bass player. understanding gear is important but if you don't know nuts about what the bass player is supposed to do then getting into gear is really useless.
2. get a decent gear to work with first ... there's no such thing as good bass or bad bass ... each different manufacturers have their standards. At the beginner level you only want to learn, you don't have preferences at the moment. Just so long as the bass sounds decent it'll be fine. Bring a friend along who knows his stuff.
3. get down rooted on your foundations.
4. don't worry too much about jargon/terms at the moment ... you'll find them out sooner or later. browse through the whole bass thread to find answers that you've been looking for instead of posting a new thread. if really don't have then post, or else alot of people will be answering like twice, thrice or even more on the same question.
5. just enjoy what you do ... that's important ...