1 - Yes.
2 - Yes, but we encourage people to try it themselves. It is not hard to understand and once you do, you will be able to do so many things by yourself, try new things, new ideas, that you will end up enjoying it (at least we hope you do).
3- Yes. Most of the changes are done that way. If you have seen your NAML already you may have found most of your requests there.
Nabble staff. We never ask for passwords.