Yes, Jstor is more widely open if you connect via a university's network. I've used it lately for some research on Spanish colonial inheritance laws.
My only advice is when looking for material on how to do something, check the dates. The world of publishing has moved quite fast these last seven years and what used to be considered sound advice for an industry that had seen little disruption and change over the past 60 years (not wholly static but the common wisdom stayed the same) has now been thrown out on its ear. The Internet and ebooks have disrupted both book publishing and periodicals to the point that the "common wisdom" on how to get in or get something published is not quite so true any longer or the reasons to pursue something publishable with a periodical have changed or no longer carry the same weight they used to.
Pursue what you love, gain skill at it, and see what doors open.