2 hours daily NIOS good enough? 16F

I will apply for subjects PCMEconimcs + English, I had eco for 11th and found it very easy and interesting hence am choosing the subject

including NIOS I have taken admission at PW Vidyapeeth (I know people shit on it alot but the one near me has really good reviews and even I am enjoying it alot)

I am planning to study 8 hours a day, and am keeping 2 hours a day for NIOS hence for eco + english and maybe PCM. This much enough to get 80% in boards?

I dont really care how much I get unless its above 75% 🫠