Aloha Melissa and Welcome! :wavey:
As another Tangled collector, the best advice I can give you is that of patience. You must be oh, so patient in this hobby ... especially if you want to be a completist (especially when collecting a theme like Tangled). Some of the pins will be relatively easy to obtain, others will be heartbreakingly difficult. I believe that if you're meant to own a pin, it'll come to you eventually - either through a trade, purchase, or zap. You just need to be patient enough (and that could take years) - but you will be able to do it, I promise. 🙂