Ah I’m afraid I don’t know of any guides beyond what I wrote! If you install python 3 though, the process is very simple:

The only caveat is that while the 2.7 version of the script will save reblogs that you’ve added content to if you use the –no-reblogs flag, the python 3 version will not save any reblogs at all with that flag. But it’s a lot easier to set up than 2.7!

In terms of getting your API key also, you can just provide your blog’s url in the various url fields they won’t verify any of it so you don’t have to worry too much about what information you put in.