Good resources:

- Your class textbook

- Your class teacher

- Your Korean dictionary

- Youtube videos on the Korean alphabet

- The wikipedia articles on the Korean language, alphabet, and phonology

Those are some of Korean alphabets.

The prounciation is as follows.

ㄱ  :  giyuk

ㄷ :  diguk

ㄹ : riul

ㅂ : biup