Hey Aish! I hope you don’t mind me answering your question, but I did psych in Year 12 last year and currently tutor psych as well, so I might be able to help you out. (Also not sure how useful this would be considering your question was quite old, but I’ll ramble on anyway)
Your best resource for catching up on research methods is the study design and the great thing is that it’s free. Specifically, pages 12-19 in the study design address the terminology you need to be aware of. After you’ve learnt the definitions (just know the meaning, no need to memorise anything), have a go at textbook/ past VCAA questions related to research methods. MCQ questions are a great starting point because you get options, making it easier to choose the correct one. Later in the year, your teacher will likely give you more questions as well but if you want, you can also get checkpoints and they’ll have a section dedicated to research methods.
I hope this helps you out and good luck with psych 🙂