<p>I recently downloaded PLT Scheme and DrScheme. When I open DrScheme, I am told to choose a language. However, I'm not familiar with any of my options, and the help guides don't really break it down to help me easily choose which choice.</p>

<p>So, first - is DrScheme and PLT Scheme really the tools I need to learn Lisp and/or Scheme? If so, what are the different languages and which one(s) should I be using?</p>

Standard (R5RS) is the actual thing so that would be your best bet
i learnt it from
http://groups.csail.mit.edu/mac/classes/6.001/abelson-sussman-lectures/
used MIT Scheme while doing that
but otherwise i find plt a lot nicer to work with