The culture of the Indian people has many traditions and highly values the institution of the family. Starting a relationship with a person of a similar culture, you immediately sign yourself up to attend all sorts of family and social events. Feel free to ask questions (just be careful with the words) and show interest. Do not be surprised if your partner's family members shun you at first. Malayalam are skeptical of foreigners in the family, like other conservative cultures. As a rule, parents expect their child to create a family with the same person as they are, so they will need time to get used to you.
On your first dates, you can discuss the traditions and rites of your culture with your new Malayalam friend. This way both of you will know what to expect, what are the similarities and differences of your backgrounds.
It's worth talking about such things, even if you are both Malayalam. Your partner's family may be vegetarians or the spiritual component of your life may be at different levels. Such points should be discussed before your relationship becomes more serious.