To know the level of the questions, You can go through with AILET previous year question papers.
Here are some preparation tips you can follow:
Be updated with General awareness, current affairs updates and even legal updates.
Work on your vocabulary. Read newspapers and relevant novels. This will also help you in increasing your speed.
Areas of Law to be understood in basic form includes: Law of Torts, Law of Contract, Constitutional Law, Criminal Law and some understanding of Family law.
Attempt online and offline mocks test. There are sectional and full length mocks available as well. Material you can refer to are: -Previous year question papers -Norman Lewis- Word Power Made easy -Verbal and Non Verbal Reasoning- By RS Agarwal -Universal guide to LLB Exam -Pearson GK Module -Monthly magazines on GK, Current Affair, Books and Novel Hope this helps.