Audit from scratch in 45 days , please if anyone can guide

Should I watch Rishabh Jain Sir's Lecture which are on YouTube, like SA wise like he has done , or Chapter wise ? How do I study after watching that lecture ? How do I revise etc.

I know these are dumb questions but i haven't studied theory ever properly. I am very afraid of theory and very weak in it. I need some guidance on how can I start with Audit and have some chance . I haven't done anything yet. I have only time till 30 April . Please guide. Only 45 days left approx. It would be a huge help.