 So you don't know how to inset, not a problem. Edge inset allows you to insert an edge when you left click. Whatever size you set for your last inset is the size it will automatically apply the next time you left click on a new face. If you tap out while dragging you will change the color of the polygroups. The default target is a single edge, complete edge loop goes all the way around, partial edge loop stops when a point is only connected to three edges, and polyloop which works in a direction perpendicular to the one you click. Center and border means you got a new center and a new border. Center means you only get the border, and center means you only get the center. Inset region connects the faces that are connected to the edge you clicked. If you turn it off, the faces stay separated. Equidistance means the border is the same size all around, standard has a slightly different border proportion, and legacy won't change the polygroup color of the border. No size limit means you can shrink to whatever size you want, default size limit means it won't let you get smaller than this, and custom size limit allows you to manually set the size to whatever you want. Equidistant snap just means it will try to keep everything as uniform as possible, and if you ever start to get triangles that you don't want, I've heard if you select custom and kick this up all the way, it might solve your problems, but the default is usually all you need. Hope that helps and as always, hope you have a fantastic day and I'll see you around.