Hello aspirant. If you are asking about prelims and mains , then here are few tips

1. For prelims, you need to know the entire syllabus. Most important of all geography, covcs, history, economics etc. Know the syllabus and subjects, no descriptive questions. Only objective questions will be there. So prepare the entire syllabus. Plan the day, week

divide the subjects and syllabus what to study for each day and mark the topics which you are facing difficulty in. Revise them

2. For mains, this is one of the toughest exams. So start with preparing GS

Join test series for optsubject , start atleast 8 months before. Since most of the questions are theoretical in both the papers, you need to spend quality time

I would suggest you to join a better academy whichever you are comfortable with so that it would be easier for you and moreover it would definitely be helpful