How do you pronounce Czech words?

I am learning Czech online, but the problem is, the pronouncation is not at all like english, and i am so, so, so confused. I need to know how to pronounce words, before I can do grammar and vocabulary! Please help. is this pronouciation online where I can hear a native Czech speak it? is this patterns in pronouncation? "kdy" sounds like a "g" sound....? Why? Also, how do the weird hat characters are pronounce?