In addition you may want to look at these two sets of tutorials (for the Parts Editor @Old_Grey 's video tutorials are your best bet, I don’t tend to use it.) Both these tutorials apply to the current version, many others around are for earlier (sometimes pre Parts Editor) versions.
Also feel free to post questions here (preferably including the .fzpz file for parts or the .fzz file for a sketch you are having trouble with) as parts creation is fairly difficult to get right until you get experienced.