You don't find the master, the master finds you.

Don't worry about 3rd eye that is irrelevant when it comes to astral projection. All you need to do is let your body go to sleep while your mind stays awake and it will happen. That's the only trick to it. That's what every single technique is trying to help you to do.

What has worked for me personally is basically while trying.. visualize yourself walking around a very familiar place and try to feel all senses, touch sight sound ect.. just try to make it as real as possible then it kind of becomes like a controlled dream allowing your body to fall asleep while you're still focused on visualization.