You could start with the Index in the guides section.

I did and some of the options either don't exist, or have changed. Some of the instructions are unclear, expecting me to know things I don't know. This is not an intuitive editor to use (not that any editor I have seen is), and I am very confused about a lot of things.

What I would prefer is a more simplified tutorial written by modders who have successfully used the tools. I fear in this case, the Dev's have a bias of knowledge: They often forget others lack the knowledge, so they forget to include certain basics in their instructions.

Now, if I had an operational base of knowledge about it, the tutorials would be a great help to me, I suppose I need more of a "Pre-Tutorial Tutorial" because I just feel paralyzed and flustered every time I open the editor.