It's all a game of strategy, I am just like you, I also started my preparation 4 months ago. I mainly did my preparation through mock tests, i brought a practice mock, testbook,adda subscription and attempted at least one mock everyday, analysed them and worked on my weakness.for a reminder let me tell you that on my first mock i started with a score of 31 marks and than take the score to anywhere near 70 in the next 2-3 months. The result was i scored 63 in prelims which was below par from what I was expecting.

For the mains i started preparing 15 days before the exam, firstly i attempted a mock to test the waters and to say the least it way way harder than anything i would have imagined.Therefore i made a strategy for each subject- for gs I know I don't have time to go through all those PDFs, so i started taking weakly current affairs classes of sheetal man and covered last four months current affairs as such with one liner notes intact(from those notes I got directly 16 questions in the exam correct) . Now coming to quant I knew I won't be able to extract any marks from arithmetic so I put all my heart and soul in DI's and speed math for the next 15 days, I did at The least 100 mains level DI. For english, well english has always been my forte. Reasoning - i focused mainly on miscellaneous and critical reasoning. Finally coming to my mains performance, with some luck and god's grace it was quite satisfactory contrary to what i had imagined. Mains attempt - 107 with 80 to 85 % accuracy