26M, full-time job (3 PM–12 AM), weak in Maths — Should I buy PW Bank Mahapack or prepare another way?

Hi everyone,
I’m 26 years old and currently working a full-time remote job (3 PM–12 AM). Because of my work schedule, I can study around 3-4 hours daily in the mornings and early afternoons.
A little about me:

BBA + MBA (Finance & Marketing)

No previous government exam preparation
Complete beginner for banking exams

Maths has always been my weakest subject, so Quant is my biggest concern.

Looking for a stable government job for long-term career security.

I’m considering buying the PW Bank Mahapack (₹3,449), which covers IBPS PO, SBI PO, Clerk, RRB, and other banking exams.

Before I purchase it, I’d like some advice:

1. Is PW Bank Mahapack worth the money?

2. How does it compare with Adda247, Oliveboard, Testbook, and Career Power?

3. Since I’m starting from scratch and weak in Maths, is this the right course, or should I first build my basics through YouTube?

4. Is it realistic to crack IBPS PO/SBI PO while working full-time with my schedule?

5. How long would it realistically take someone like me?

What are the biggest mistakes beginners make?
If you were starting today with a weak Quant background, which platform would you choose?
Should I prepare only for banking exams, or follow a strategy that also keeps SSC CGL as an option?
I’d especially love to hear from people who started with weak Maths and still managed to clear banking exams. How did you improve your Quant, and what resources helped the most?