Aww, I love this concept, there are actually a couple dragon guilds around the server, I’m not sure what their names are anymore as it has been a hot minute since I came across them, but just be yourself and have fun, I’m sure there are plenty of guilds that would love to take you in 
That being said if you’re looking for an Alliance guild and you’d like a place to call home for now, my guild has taken in a couple dragon rpers in the past before and they’ve rp’ed just fine around others and were generally really friendly people. We’re a social event planning and entertainment company I have not fully returned to the game yet thus my guild is being run at this time by my co-gm Dreyfusxano, add him to friends and send him an in-game letter if you’re interested, I’ll let him know to keep an eye out for ya 
If however you are looking for a Horde side guild, I’d recommend checking out the 
Comprehensive Guide to Moon Guard Horde Guilds - Moon Guard - World of Warcraft Forums (blizzard.com) for a good start on finding a guild as well
Also congrats on getting your Vial of Sands, that is a wonderful milestone for any player to achieve 