Are there any walk-through or general guides out there on how to use biblatex? I have not found any.
I'm afraid the reason for your lack of success in finding a walk-through or general guide to the
biblatex package is rather simple: No such document appears to have been written so far. As you note, the package's main documentation is very complete; however, it doesn't qualify as a user guide. To be sure, the document does not claim to be a user guide; it wisely notes that it is a "systematic reference manual".
That said, there are some online resources that are quite helpful to get beginners going on their way toward using the
biblatex package competently. Some of these resources are contained in the questions (and associated answers) previously posted on TeX.SE and mentioned in the comments posted above. I heartily recommend that you study the information provided in those places. There are also quite a few biblatex experts who participate regularly in TeX.SE; questions posted on this site about biblatex specifics always appear to be answered quickly and in very helpful ways.
biblatexrequire only small source adjustments. On the other hand, creating a
biblatexstyle is like creating a
.bstfile or a LaTeX package something that I would say is a task for 'programmers', not 'users' at all. (I get occasional messages for my
siunitxpackage saying that the user guide is not sufficiently accessible, but this tends to come down to 'the quick start does not cover my particular use case'.)