I always finding it daunting to dive into something new when you don't know much about it, but I think no matter what material you provide as tutorial, nothing beats jumping into it and just having a go (as I found out with doing calligraphy). It would be really helpful for me (at least) if you were able to compile a list of questions that people have asked you in the past about doing watercolour painting and create a post based on it (or if you have then provide a link).