I think the Header images and descriptors are spot on. Great work
Bit of an optional thing, but consistent themes among header images for tutorials go long ways to help identify and standardize (like specific colors for the type of difficulty, icons of which tool is used, icon of what the tutorial is about). Not sure if you guys would like that type of thing, but it is a cool option if there are multiple tutorials later and there are lists that show them all together, this will help filter them easily.