There are slightly different ways to make a pizza according to where in Italy or the USA (there are specific American styles, too) you are, but these are the general tips to getting a good then crust pizza Napoli:
1. Use a 00 flour, preferably one suited to pizza making. The 00 flour will give a crunch to the edges while still staying slightly chewy on the edge. The pizzas I’ve had in Italy then to have a aerated light but bulbous outer crust - almost like a handle - and then a thin stretched base.
2. Other than the flour, the dough should contain yeast (could be a sourdough), salt, water, and something to help the dough colour quickly: malt (typical in Italy), sugar (typical elsewhere), and often a little oil or what the Italians call “struttto” or hard fat (like rendered pork fat). The strutto isn’t necessary. You shouldn’t need soya or milk.
3. You will need extra flour to shape the dough, as the dough should be soft enough so it stretches with its own weight - if made by hand without rolling - when draped over your knuckles. If you’re using a rolling machine you will have to make the dough firmer but this will affect the texture.
4. To help make the dough chewy, the general principal is to use a little yeast and leave the dough longer. Two hours is probably too little. Reduce the yeast and leave it for four hours without dividing if you can. Then divide the dough into 150g - 200g pieces, shape these into balls and sit them on a floured tray somewhere cool (not fridge cold) covered with a cloth.
Here are some pictures of my pizza from a week ago:

