Not sure about the Blender 3D Cursor? Neither was I when I picked up Blender a few times.
It drove me crazy, what is this, why is it there? It's not in any modelling application I've used before.
Blender 2.8 and up has tamed it enough for me to finally get my head around it.
Save yourself some time and frustration with this tutorial
able of Contents:
00:00 - Intro
01:13 - Basics
03:26 - Some Control
07:42 - Hamdy UIsage