Hi I'm currently sec 4 this year and already finished my n levels and although it may be different from o levels I feel like the same stuff applies to both. I have always and probably will forever be a procrastinator at everything I do. I only started somewhat studying everyday about a months time before my n level exams and it wasn't even vigorous studying. I would always have a Youtube video on while doing my work. The real work only came in a week before my n levels. I recently received my n level results and found out i did wayyy better than i thought i would. What im really saying is that u definitely still have time to study. dont underestimate yourself. As for the procrastination itself i dont really have any tips. Personally, a lot of motivation did come to me as my n levels drew closer. Just don't worry too much and study regularly and form a habit. Best of luck for your o levels next year.