Your said:
vbs, powershell, or java script?
If your interest is mostly Windows, then VBScript is your best bet.
Otherwise, I would have said PHP or Java.
(Never confuse Java with JavaScript). Still, VB cript is an excellent pick.
There are a number of tutorials on on the major languages in current use.
Once you pick one, come back here and ask for help. CH is free and even better than a paid-for tutor.
BTW, if you work as an administrator in a Windows environment, you need to know power-shell. DOS is dead.