Yup, I do it all alone, from rough sketches to finished book. There are some stages that I do very roughly, like storyboards, for example - mine are very rudimentary. Some things I don't do at all - like inking. I put color over my pencilled pages enhanced in Photoshop.
As for tutorials, I didn't really use any... but I recommend two books that I found absolutely brilliant and very helpful: Making Comics by Scott McCloud and Framed Ink by Marcos Mateu-Mestre