Dragons in the Physical plane are not real. I've heard they are real in the Astral plane though. If you wish to see them, start learning to Astral Project.
to do dragon magick, you first need the basics of magic. [meditation grounding, charging, circle casting so on] dragon's are astral, while they do travel to the physical sometimes [not as physical beings, they're astral] you need to work on astral projection, and chakra meditation. i have been told some people just can't see them, but they can see other things like spirits, it's just one of those some can some can't things.
i have come across some rituals you can use to help you call to your companion dragon if you are having troubling seeing it, or you want it to come see you, but i haven't tried it, so i don't know if it works or not. myself, while i have seen dragons through guided meditation and astral projection, i met my companion [hopefully] while cleansing my chakra's about 3 years after starting Dragon Magick. keep in mind it might take you a long time to have a companion, but seeing dragons, if you can astrally project, you can see them. otherwise, try leaving some offerings for them to stop by, and work on your chakra's to help you see things like spirits and astral beings.
A great way to learn how to AP is to start Lucid dreaming. Lucid dreaming is similar to AP but its more easy.
How to lucid dream? You can start by getting a journal, Place it next to your bed. Every night before going to sleep do a little meditation and call upon your spirit guide, Ask your guide to guide you through you dream. Then simply think of a certain topic you wanna dream about then go to sleep. You may dream about the topic or you may not, Depends on will power and other factors.
When you wake up write down every thing you remember. Do this every night, Soon you'll be able to have full control over dreams and be able to Astral project.
-Thy Protector-
First off, dragons are only located on the astral plane. Secondly some magicians find it questionable about their existance. While others believe they are 100percent certain they are real. D.J Conawy, in my opinion has great books.
In addition, open your third eye.
D.J Conway books On Dragon Magick
Dancing with Dragons: Invoke Their Ageless Wisdom and Power (1994) Llewellyn PublicationsISBN 1-56718-165-1,ISBN 978-1-56718-165-4
Mystical Dragon Magic: Teachings of the Five Inner Rings(2007) Llewellyn PublicationsISBN 0-7387-1099-7,ISBN 978-0-7387-1099-0
Another Dragon Magick Book
Sea, Land, Sky: A Dragon Magick Grimoire,Parker J. Torrence(Author)
chakra meditation is something that should be done daily, forever, just to keep everything balanced. at first it'll take longer, i can't say how long though. myself, it took me about 10-15 minutes per chakra, so i focused on one each day for the first week, then i would focus on cleanings all of them, or at least half. it took about a month for me to become good at chakra work. but in magic, and especially when dealing with dragons, patients is a virtue.
D.J. Conway, since she's been brought up, i don't recommend highly. i will say her guided meditation is great, and there's this one chapter near the end that really interested me [but i think it was missing a few pages because it just ends] however, some people say she's the one who invented dragon magick, and she's the 'expert' myself, no. read her work, but after you look into other areas. Parker J. Torrence is alright, never read his book, but i've read about him, and talk to people, he's alright.
fox-moon is a good site: http://www.fox-moon.com/drag/dragon5.html
Well, if someone likes Dragon Magick, study all the books you can. Regardless of opinions and then you can form your own. I just suggested it, since someone wanted to understand it. People ask and I give my knowledge, simple as that.