Preparation
Hi!
If you have little time then it is worth working with a teacher /coach. They would customize your preparation.
You could check out my posls if interested in exploring this idea:
https://www.chess.com/blog/maafernan/chess-skills-development
https://www.chess.com/blog/maafernan/guidelines-for-a-study-plan-beginner-intermediate-players
Good luck!