When you are learning a new word, you have to pay attention to its pronunciation, in order to be able to recognize it when you hear it, or to be understood when you pronounce it.
When you discover a word in the dictionary and you want to know how to pronounce it, there is a very “simple” tool to use : the phonetic alphabet. You have to get familiar with the symbols and the sound they represent in the first place though… You can find phonetic indications in every dictionary.
Here is a phonemic chart :
Hope you will soon get used to it 🙂 !