There is no one correct way to pronounce words in English. While there are some general rules, there are many exceptions. For example, the letter c can be pronounced as either a hard c sound (like in the word cat) or a soft c sound (like in the word cello). The same goes for the letter g. It can be pronounced as a hard g sound (like in the word goat) or a soft g sound (like in the word gem).
The best way to learn how to pronounce words correctly is to listen to native speakers and imitate their pronunciation. You can also look up the pronunciation of words in a dictionary.