Take some decent apple juice without preservatives. Add a bit of yeast; baking yeast for bread at the supermarket will do just fine. Observe basic sanitation principles. Add some sugar, perhaps 150 g per litre of juice. Leave the concoction in a cool, dry place for a few months. A one-way seal for the CO2 release is preferable (a balloon works) but is not strictly required; leave the cap on loose. Carefully pour off the result into a new vessel. Let this settle for another month.
A very palatable drink results at about 4 - 5% alcohol by volume. People figured this out thousands of years ago. And they did not have plastic bottles, germ theory, or infinite hot water on tap. It's trivial to make an alcoholic beverage. The rest is finesse. And posturing.