Welcome to SaleHoo, glad to have you with us :)
I would not say that there is a written guide or systematic step-by-step approach in how you can maximize what Salehoo has to offer.
But many, including myself, would definitely suggest that you go through our Link hidden: Login to view as well as through the forum, you can search for topics that you are interested in by using our search in the forum option. Another must read would be our Link hidden: Login to view!
Once you done all the reading, then you may want to start taking our Link hidden: Login to view for a spin to help you find a profitable product to sell :) The lab also suggests suppliers so you don't have to search the directory.
Hope this helps you off to a good start and should you need help with anything else please let us know.
All the best!