Hey there

Since you have dropped an year for JEE advanced so you must be having Idea about the toughness of the exam. So I'll suggest you to complete your syllabus before March for JEE mains and advanced both. Now 1 month you give you full length tests online apart from the aits. It shall boost your preparation make notes of those topics which is weak from the test and do revise them thoroughly. JEE advanced preparation needs practice and so do practice a lot complete and revise 2-3 times your package do not get distracted it's only one year of patience believe me life at iits will remove your stress.

Check about JEE advanced

https://www.google.com/url?sa=t&source=web&rct=j&url=https://engineering.careers360.com/exams/jee-advanced&ved=2ahUKEwjTsbKupa_kAhUBO48KHYsjBK4QFjAAegQIBBAB&usg=AOvVaw27auQU717YYuHGYaNfL5SD

Good luck