Do you have any tips for improving Polish pronunciation.
You can download the audio that accompanies Colloquial Polish from the publisher for free, or just listen to individual tracks. The first fourteen tracks deal with pronunciation specifically (edit: the first track is just a lot of introductory waffle). If you want to follow along with the book, you could also go to its Amazon page and use the "Look inside" feature (click on the book's cover image).
Try watching Polish youtubers/Polish disney movies. Those can help you get used to the fast pace of the language also. And once you have learned the alphabet,the accents and stuff like 'dz', you'll be able to pronounce words easier. (with practice) Polish is admittedly a hard language (unless you're a native speaker of any slavic language) but it's not the hardest, and also achievable! If you'd like anyone to practice your Polish with, i'm here. And all the best with your language learning!
Learn the pronunciation of every letter and combination - the language is almost completely phonetic! I is worth the couple hours it will take you to learn. Find a nice book with listening texts for learners. Repeat, record, listen, repeat, record, listen. Talk to people too of course!