AutoCAD ! ?

how to use this software ? makes me dizzy thinking about it. i try to get knowing it first but then it become more weird ! how to set the scale ? huhu ~ AutoCAD is a software that engineering student use to do their work or something like that.

now i'm trying to do my work but i cannot do it because i don't understand a thing about this AutoCAD. how to use it ? ouh ~~ need help A.S.A.P !