Welcome! I will collect here all the information I can find about folding origami dragons and even more!
Just for starters, folded origami models could be simple as this guy over here:
or as complex as this one:
Eastern dragon - very complex origami dragon with scales
Of course, the latter is very complex and requires lots of experience, skill, time and special origami paper to fold. But don’t worry, if you are really into origami dragons and practice a lot, then maybe one day you will be able to fold this baby.
For complete beginners in origami I will suggest to start from the most basic models like the crane. Here is a video tutorial on how to make one:
Hint: with a couple of basic adjustments you can turn an origami crane into origami dragon.
You can easily figure out by yourself how 
There are much tutorials, guides and instructions for folding various origami models, but much are either blurry (in case of videos) or very confusing and aimed at someone who already has experience with origami. I will make sure that all content that is being posted here is as clear as it could be. Stuff for advanced users will be marked as such. You can always return to such content when you get some experience 
