hello aspirant.

its good to know that you are preparing for clat from 11th. clat undergraduate exam duration is 2 hours. questions will be total 200 marks, 1 mark for each question. the topics you need to cover is

English including comprehension

General Knowledge and Current Affairs

Elementary Mathematics (Numerical Ability)

Legal Aptitude

Logical Reasoning

right now you can practice the english and numerical aptitude.

there is a book available for clat , by arihant publication. you can follow this.