Basic: 아, 야, 어, 여, 오,요, 으,이
Diphthings: 에, 예, 애, 얘, 외, 위, 의, 와, 워, 왜, 웨
There are plenty of youtube videos which demonstrate the pronunciation. Also, the audio function on Google Translate allows you to hear the Korean sounds.
If you want to learn them properly, then you could have a session with one of the Korean teachers on italki. I think you'll get a lot out of it! :)