Dear Abhinav,

HSC text books are veryimportant to crack your MHT CET exam as syllabus is based on them and it will help you to claer your concepts and to build your fundamentals strong.

After, completing your text books if you want you can go for Arihant ot Marvel and Target publication.

As, per the new changes MHT CET level is raised to JEE Main so you need to do lot of practice. Solve as much as mock test series for your practice. 

Your 11th class will hold 20% weightage and 12th class will hold 80% of weighatge so prepare accordingly. 

Good Luck!!