Prof Timo Salmi has a collection of batch scripts and tips that you can read on his site, or download the ZIP files to look at, if you want to learn that way.
Search alt.msdos.batch.nt on google groups for his regular FAQ postings.
If you want to read and follow forums, then there are several.
Getting premade scripts and modifying them, then debugging the failures is a good way to pick up tips and techniques.
Asking questions on the forums will get you answers, if you supply factual details.
AFAIK there are no good tutorials for modern NT scripting and that's because so much of batch scripting is undocumented techniques, tips, and limitations, discovered by so many people.