Folded paper is cheap magic, but only if you stop babying it and start creasing with intent.
You can go very far with plain printer paper, especially while you’re learning to fold accurately. It’s cheap, easy to find, and you won’t feel guilty experimenting or messing up. The trade-offs: it’s a bit thick for complex models and doesn’t hold tiny details or elegant curves as well as thinner, purpose-made origami paper. A good approach is to practice new models on printer paper until the steps feel comfortable, then refold your favorites with nicer paper when you want better shaping or display pieces. If you’re on a budget, grab a ream of decent printer paper and maybe one pack of inexpensive colored origami squares for when you want that clean, crisp look.
Usually it’s a mix of three things: rushing the alignment, inconsistent pressure, and paper that’s not ideal for the model. People in tutorials are often using high-quality paper under good lighting and have practiced that model many times. You can get noticeably sharper results by slowing down the first alignment of every fold, pinching only the ends first, then running your nail or a smooth tool along the crease in one firm pass. Work on a hard, flat surface, and don’t be afraid to unfold and refold early if something is clearly off. Over a few sessions, your hands will learn to ‘feel’ when edges are truly aligned, and your folds will start looking much closer to the demo, even with ordinary paper.
Treat folding more like learning an instrument than binge-watching. Instead of jumping between unrelated tutorials, pick a small set of models that stretch you a bit and repeat them until you can do the moves without pausing every step. Pay attention to techniques instead of just the finished shape: things like reverse folds, squash folds, sinks, and pre-creasing show up everywhere, so drilling them on simple models pays off later. It also helps to mix in diagrams, not just videos, so you build your ability to read symbols and visualize steps on your own. A notebook or photo log of what you’ve folded, what went wrong, and what you want to try next turns your practice from random entertainment into real skill-building over time.