Inserting symbols into AutoCAD is very easy.
Watch my video and I'll show you how to insert almost any symbol into AutoCAD.
Or read my blog here - https://surveyorinsider.com/insert-symbol-in-autocad/
I insert symbols such as degree, plus/minus, theta, delta, approx, diameter and more.
To paste symbols into AutoCAD from the character map, use the keyboard shortcut ctrl+v to paste after selecting copy.