If you do make the dough by hand be sure to not over work the dough, you just want to gently combine the ingredients.
The dough can be made in a stand up mixer with the flat beaters, beat on low just to bring the dough together and continue with the recipe.
You can also leave the dough in the fridge over night.
If you find your dough is browning too much, then cover it with foil and continue baking.
Store the homemade puff pastry in the refrigerator for 2-3 days. Be sure it is sealed in plastic wrap.
You can also freeze it. Wrap it well in plastic wrap and place in a freezer-safe bag or container, it will keep in the freezer for up to a month.
Before using the frozen dough, leave it folded and wrapped and thaw it in the fridge overnight. Roll the dough out without unfolding it first.
Find it online: https://allguiderecipes.info/puff-pastry/