These came in the post. Any tips/tricks for getting right the first time?

So my mother was saying how she'd make podpiwek for the family when she was young. I had these sent from Poland so I can surprise her.

My problem. I live in the tropics and last time I made home brew beer it was super strong in alcohol probably because of the heat. So I'm a little hesitant to start this in an Australian summer.

Any advice on what else can go wrong?