Language / Pronunciation of ę and ą? [4]

I looked for answers to my questions but I havent found what Im still looking for... Im a Czech and I learn Polish. These languages are quite similiar but I have no idea how to pronounce ę and ą. I know those vowals are nasal but how to pronounce these ones? And I also dont know how to ponounce ś, ć and ź. They should be softer than sz, cz and ż. Is there any video what to do with lips and a tongue like I can see learning English? Thanks a lot for your effort to help me.

Language / I can't type ą (first unique Polish letter similar to 'a') [5]

I don't know what's wrong but I can't type ą. Other polish letters are ok including Ą. Don't you know how to fix it? I have windows 7.