You can use learning materials from this site: <a href="http://www.goethe-verlag.com/book2/KO/KOPL/KOPL002.HTM">http://www.goethe-verlag.com/book2/KO/KOPL/KOPL002.HTM</a>;

In my oppinion you should find polish teacher/tutor. Why? Because you need good foundations. Next step: you can learn Polish via Internet, for example here on Italki. And you have toremember that the most important is to speak with people. Doesn not matter HOW. Maybe you would like write emails or chat to "language partners" or some friends. It is up to you. I am going to keep my fingers cross ;-)