u/Double-Barracuda-365

I used to type in notepad then I check it using chatgpt or gemini, Al spot each and every minute error. Since it is descriptive exam So what should be my level of preparation regarding this.

Should I need to be complete error Free

I have basic understanding of important topics from qre

But still I am not confident especially english. What should I do

Should I do mock test or practice book ?