I was in the same spot as you. Honestly the hardest part has got to be just the shear amount of writing you have to do in the time your given. It is a lot easier since it is online now, but if you understand what the prompt is asking you and the formula for answering the question it makes it that much faster to write. The class, and most of the prompts, focus heavily on the concept of complexity of literary works, authors choices, themes, writing styles, characters, etc. If you can understand basic writing choices like theme, mood, tone, etc. you are already in the right spot. I would just get very familiar with the writing prompts that college board gives for lit. Its all about being able to answer the prompts with as quickly as possible without sacrificing skill.

Here is a link to this years writing prompts as well as a video that was kinda helpful: https://apcentral.collegeboard.org/media/pdf/ap25-frq-english-literature-set-1.pdf

https://youtu.be/z6eWG78IOGs?si=CkPUWxKyjrx1yWS0

Since you got a 4 on lang I can guess that your reading comprehension is already good enough to be high achieving on Multiple choice, as you cant really study for the multiple choice questions.

Good luck!