Face to face always works better.
Along with all her other good advice, Atch is absolutely 100% correct here. Poland is very much a face to face (and/or bird in the hand) kind of place. Physical presence is nine tenths of the law.
Also, I'd add then while trotting around your qualifications, dress up! Polish people in certain settings place (like work usually) put a lot of stock in how... professional.... someone looks. Before going around you might want to hang around office buildings (more private than public) to get a feel for how professional women dress while on the job. Once you have an idea.... don't try to mimic the look exactly but move some in that direction.
You have to be a bit pushy in Poland
Polish people generally approve of assertive people who know what they want and aren't afraid to say so out loud. Don't be humble or self-effacing in any interview, be calm, confident and sure of yourself.
Finally... (for now) interactions between adults and small children are (like almost everything else) culture specific. It won't be any good if you get hired and don't know how to interact with a Polish child...