This is a good page to get introduced into this topic. Click on the link and practice the sounds. Practice for, at least, 1o minutes. Repeat this activity until you feel confident with the symbols and sounds.
This is one of the most interesting pages I have found for Phonetics. You can take a test to find out your knowledge of phonetics in English (Entry/Exit tests on the left of the page) and play some funny and instructive games such as the“Phonemic Hangman”, “Shoot-a -Symbol”, and so on. a highly recommended page for students and teachers, too!!
Click on the link to find out about this topic http://cambridgeenglishonline.com/Phonetics_Focus/.
There is also a “Flash Card Maker”, which can be very helpful.