I can't find answer to my question in this FAQ. Who can I ask for help?
You can send your question to email@example.com mailing list. There's no guarantee you'll get an answer there, but usually, there are a number of experienced developers and IDE users who will be glad to help you. Note that you have to be signed up to the mailing list to be able to post.
It might be a good idea to search the mailing list web archive first.
Also, you can explore NetBeans Support Resources.