All magic is dangerous. Everything in life is dangerous...and there's nothing more black than a shadow.
The practice of it basically goes that the next time you get upset, annoyed, or irritated, then wonder if you're really an innocent victim, or a guilty survivor, or an active participant in your own suffering. A lot of people can remain at that level, but to peek at the effect of your thoughts and emotions in the otherworld...of course, you must have been there. Or in one of them.
So I'd advise going through this: http://thebookoft.wordpress.com/knowledge/witchcraft-from-the-ground-up/
And take a left turn after section 4.
(Or if you get bored, there are YouTube searches of "guided meditations" where if something scary happens that isn't supposed to happen, then you've floated too close to the shadow world.)
I can't tell you how to get there because I went there by accident and got stuck. But once you get there, we can probably swap stories and techniques. Good luck!
What you're really looking for is a fantasy. Shadow meditation is something that is more obtainable. As has been said, it's about putting on your waders and boots and taking a walk through murky and muddy waters of your inner psyche and soul.
When you work with the shadows of yourself, you are faced with doubts, the unknown. You deal with your fears. Most people never have the courage to open such doors into themselves. But looking, discovery, and acceptance are three very different things. Few can rarely accept and change once they've found the answers.
This shadow magick that you're asking to learn is just one small step along the journey to self-realization, actualization, and enlightenment. All three are things that most only hope to achieve. You must be honest with yourself, step beyond the fantasy that we wrap ourselves in as we move through life, and accept the hard truths that we find along life's journey. It's unique to everyone, and no two people's paths are ever the same.
If you want to really learn about yourself, this link might help:
http://kundalini-teacher.com/meditations/shadowmed.php
Before you do a shadow meditation, you need to learn how to ground and work on discernment. Right now, your enthusiasm and naivety leave you vulnerable to people and entities that prey on the energies they could gain from your emotions, leaving you a husk. They are the only vampires you'll ever find, and I do hope you never meet them, much less ever desire to become one yourself (yes, I read your profile).
Read these two articles as well to learn how to protect yourself:
Grounding:
http://kundalini-teacher.com/meditations/grounding.php
just heard from grand grandpa (dead:() i shoud not do shadows only the light manipulation witch can form shadows and i will be able then to walk in the shadow if i want
I referred the video game title as a demonstration of a psychological process. Instead of an otherworld physically traveled to by portal, of course it's going to be pathworking.
I figured that the Liber Novus of C.G. Jung would be a little too heavy reading for brand, so Persona 4 it is.
annd aeon_wings shaadows are black (referring to ppost 14) i know but they are my whiite and i love the dark so it is belief i know een shadows can do damage but think and if u read my bio the last few words
i am only stronger in the shadows
then i am better and i know an idea of peace in the darkness in the shadws i am safer to be oaround but i am kinnder in the light