Hi. I have never done this so am not able to offer much, but first, chill. You won’t always get an instant response, no need to keep bumping it.
Did you follow these instructions to the word?
Cannot open C:\Users\kiantat.wong\sdk\jme3-core-baselibs\nbproject\project.xml
This looks like it isn’t finding the file project.xml or some other issue with the file?
More importantly - you mention you are new to java (raises some questions in itself but more power to you) and netbeans - is there any reason you can’t just download
from the github? It includes a version of netbeans specifically for JME and will save you some hastle.