i practice dragon magic. dragons are real, they just aren't pysical. there is a believe that i also hold they were on this plain, but once humans started hunting them they travels to the astral for protection. now they are cautious around humans. you can summon a dragon, but it won't be a physical dragon. you will feel it in the room, and it can attack you, but not physically. i do advise against summoning a dragon, not just due to lack of experience, but from what it sounds like you have no respect for them, and they will know, and depending on which type of dragon you call forth it is very dangerous.
i understand this sounds confusing, think of demons, they're real, but they're not physical creatures, they're invisible unless they wish to be seen, and they can attack humans. dragons are similar in that way, yes there are dragons who or nicer than others, but i still advise against summoning one. try learning more and then traveling to the astral. observe them, then try and befriend them. dragons are our equals, if you fear them, or feel you can lord over them, it will end badly for you.