Press G and scroll the mouse wheel (up = smaller, down = larger) to change the size of the proportional editing circle.This video shows the basics of proportional editing, which is useful for both clothing and hair creation!.sg5150: Ins & Outs of Sims 4 Studio with Blender.Teanmoon's Handy Dandy Blender Cheat Sheet.Lexiconluthor: Blender Camera Controls and Tools - Very useful for people new to blender!.
Blender Fundamentals - YouTube Playlist.I highly recommend going through this list if you are just starting out in custom content creation! They have several tutorials that are just for beginners whether you want to just recolor or try your hand at mesh editing.