If you stick to your two hours of studying a day and learn from what you missed, I think you can improve by 150+ points.
My SAT baseline was 1400 (so really close to yours) and that was coming fresh from a prep course. Then I used Khan Acad to study for two months and ended up with a 1510 SAT. Those prep books are good but I’d say Khan Acad is even better for studying SAT just because it is personalized and gives you recommendations on what to work on.
Good luck! Fun times ahead! And if you want, I can send you a pic of my SAT Math one-pager if you DM me.