Language / Does anyone know where I can learn Polish for free? [35]

A really great site that I use and recommend to all my students is memrise.com. It's like flashcards, but better.

Food / How to make this syrup for Polish Ginger Beer? [8]

Are you still in Poland? You can buy ginger beer at the shop. If not, try a specialty beer shop. If you are only interested in the syrup, I would look in the coffee or alcohol aisle at your supermarket, a lot of times they have syrup similar to that there.