Not that it has ever been hard. Fermentation is a natural process. All you need is a bit of the specialized fungi we call yeast. The Sumerians were brewing beer in 3200 B.C.; birds can become buzzed (or dangerously drunk) on fermented berries. Once you figure out that water has a higher boiling point than ethyl alcohol, you can start to get fancy distilling hooch.
https://www.arkansasonline.com/news/2019/jan/27/the-moonshiner-s-tale-carrying-on-famil/?features