My rights on my deceased husband policy

Question

I am Vithyalakshmi Sureshkumar was lived in Thiruthuraipoondi with my husband who has died on 26.01.2021 due to accident. On that time my daughter was one month old. My in law's family still now not hand over my property and also I came to know that they are taking the amount from his account. Moreover I want to know the details of property they have?. Because we( myself & my daughter) are one of the legal hire. Can You please explain procedure to get the details and there is any possible to get the details through RTI about the bank statement of my husband and property for my husband?.