>>627520 (OP)You can use regular printer paper, but I recommend get proper origami paper. I live in the UK and the type of origami paper that is cheap and available for me is by a company called TUTTLE. They're not the highest quality origami paper, but it's perfect for simple and beginner type models.
If you are going to use printer paper, just do a quick search for how to fold a square out of printer paper and you will find plenty of tutorials on how to do that.
Start with making simple origami models, something like a crane or lotus flower.
If you do a search on YouTube for that, you'll find plenty of decent videos showing you how to make them. Once you've made one or two of each, maybe pick a different simpler model, again from YT, of something you like and just make it and keep making models into you get good.
Eventually you will have to start making models from written instructions. They are definitely harder to read, but it is definitely something you will want to learn how to do if you want to make more advanced models.