I had just written this out in full when my computer crashed and wiped it all, so this time I'll try get straight to the point.
I'm relatively new to origami, ive always loved it but never really tried it properlly, but in the last six months ive become quite addicted.
Using both YouTube videos and authentic diagrams, I have very quickly progressed to complex models such as Kade Chans fiery dragon, and his T-rex, I can gladly say I only used the diagrams for the dragon

So the other day I foolishly atempted Sotashi Kamiyas ancient dragon, I used my homemade red and black tissue foil (it was gonna look great) but after many tries i gave up, all the sheets of paper i used just got mashed up and unworkable. Then it dawned on me that I'd really only touched on the intermediate models, and not really built up my skills in folding.
I don't really know how to finish this, but basically im stuck, I want to be ambitious, but I want to be technically very accurate too, so simpler models are needed, but ones that will at least be nice to look at.
If this makes any sense, I would greatly appreciate any advice on where I should be looking for diagrams and exciting models at an intermediate level. Or maybe store bing to complex if you guys think it's appropriate.
Oh and ps, any tips on keeping my paper crisp instead of it turning to mush after a solid few hours of folding.
Cheers, fionn