The difficulty level of the questions of  MHT CET is raised to JEE Main. Here are some preparation tips you can follow given below:

You should focus on class 12th more as it carry more weightage in the exam. There is no negative marking in MHT CET. So, try to complete full paper.

You should refer your text books first as syllabus is based on them. Practice as much as you can focus on the important topics and solve MCQs for your practice.

You can also go through complete mock test series to analyze your preparation at regular interval of time.