1.
Solidify your knowledge of hangul (I recommend using 90-day-korean as the website has audios for each symbol), then
2.
Familiarise yourself with the language through things like music, dramas, youtube videos etc.
3.
Go through the ttmik level 1 book (I'm pretty sure you can download it for free online).
That shouldn't put you too far ahead but with give you a pretty good understanding of the language in a short amount of time.