Silpee, we totally understand your predicament because you are not alone in this. But for students like you we have an article on how to improve legal aptitude for CLAT preparation. You can check that at: https://law.careers360.com/articles/how-prepare-for-clat-legal-aptitude-section-harsh-gagrani Now that we do not have access to buying books, you should go back to the old school of learning. Turn to News Papers, turn to Legal section and learn the jargons and try to learn the meaning and where they can be used. Because the highest qualification required for CLAT is 12th, it is understood that you come with zero legal knowledge and so the questions wouldn't be that tough. You may be asked questions on fact basis to test your legal reasoning. Law of Tort, Law of Contracts, Criminal Law, Constitutional law, Intellectual property law, Labour law, International law and family law are few subjects you should familiarize yourself with.  Get a gist of these laws and you will be fine. Practise as many as sample papers as you can. Few of them can be accessed at: https://law.careers360.com/download/clat-sample-papers-previous-years

Hii Silpee!
It is understood that the lockdown is a little problametic but good too. Now, in times where you can't buy books for the legal apptitude preparation for CLAT, you can search online for previous year question papers. You can also visit the official Website and search for the same. You can ask your friends, if any, and get the pics of the question banks related to it. If you access to an e-library, you can search for the books there.
Hope this helps.
Good luck!