Hey Ayeong!
I went into Lit 3/4 without 1/2 as well so hopefully I can give you some insights!
First, I'd recommend having a very thorough read through of VCAA resources including the Lit study design, past examiners reports, and sample essays. Make sure you understand what literature is about, because it isn't simply "hard English". It's marked on a very different criteria and you must make sure that you aren't simply writing 'English-style' essays in Lit.
Second, find out what texts your school will be doing, get physical copies of those texts, and read them. You can start annotating and analysing as well if you want, but personally I think making sure that you know the content inside out during the holidays would be enough.
Third, get high-scoring essays from teachers and past students. They don't necessarily have to be for your specific texts. The important thing is to know how to structure your responses. You can also create a word doc to collect good vocabulary and sentences to use in your own essays.
I hope this helps! Good luck!