I am going to create a large document, roughly 30-40 pages, that involves images, mathematical symbols, headings, a table of contents, and plain text. The end result will be a pdf or some other file type. I run linux and I am thinking of using Latex.

I am looking for a personal recommendation from someone who:
1, has read a good tutorial on latex and thinks it will help me accomplish what I am trying to do
2. someone who knows latex well and knows what tutorial I should be reading

Also what editor would be best for something like this? Keep in mind that this is a very large document, 30-40 pages, with headings and so forth, kind of like an ebook.

Google has lots of tutorials on latex but I am not sure which to start with and this is why I am posting so please don't say search google.