I'll toss out a few answers.
How do I get in the correct mindset to astral project?
There are many ways to do this - I particularly am fond of mysterioustranger's answer. Meditation is probably the best for you right now (seeing as
you're new to it, just work on meditation for now).
Where to go in the astral plane? Are there any limitations?
I think this depends on where you personally want to go. From my experiences, the only limitations are the ones you believe in.
What are the dangers? I have heard that there are no dangers astral projecting but that seems too good to be true. I mean what do you do when
you're faced with a dark entity?
Here, I'm going to play Devil's Advocate to the other answers to this question. Here's the only real
danger you have to face on the astral:
Forgetting that you are in control. I won't lie, there are a lot of nasty things crawling on the astral that few books tell you about: Negative
Entities (NEGs, Robert Bruce's term), thoughtforms, even physical emotions.
The thing is, none of these can harm you, unless you think they can.
Should you ever come across a negative entity, quite literally try to give it a hug (before you disregard this as a joke, read on). On the astral,
think of the negative entity as a bully - if you have a lot of stuff that the bully likes (such as negative feelings like anger, hatred), or the bully
knows you fear them, then they will stick to you. Give it a hug, show it that you aren't afraid, laugh at it, try to imagine it doing something silly
(your thoughts will literally take life on the astral).
To quote a friend: "Your astral body ain't your physical body - the worst that could happen is that the projection ends early".
Can you eat/breathe or anything like that in the astral plane?
Well, you can...sort of - but there's not really a need for it. Does a ghost need to eat or breathe?
Are there any limitations?
Again, your mind's the limit
Can I talk with spirit guide there?
You can, but just make sure it's really your guide
. You can also do this through meditation as well.
What about non/sub-humans? Harmful, helpful, uncommunicative?
Depends on what you run into - some of the entities might be fun, others in astonishment (almost as if they've never seen a human astral projecting
before), some may not even be able to detect you, because to them, your nothing more than a ghost.
Now, instead of telling you "You need to study more", I'll provide some of the resources that you should consider looking to (these will help you
become more "well rounded", at least literature-wise).
1. Robert Monroe (I advise reading all 3 of his books - mentioned in the wiki)
2. Robert Bruce - Astral Dynamics
). This one really helped me out a lot in understanding what I couldn't learn
from Robert Monroe's information.
3. When you feel "ready" goto here (school.obe4u.com...
) and click the banner for their guidebook). It's pretty much a cut-down method to
astral projecting. Which they offer for free (238 pages).
4. I have to include AstralSociety (as I was a former member), and AstralPulse (you'll have to google them). Both of these forums are filled with
devoted astral projectors (more people on the AstralPulse though).
The above should be enough to get started at least.