I’m not Indian but went to India to support a friend getting married. They had five different events (that we were invited too, more that we weren’t), each with their own set of rituals and customs. One where you just put turmeric and spices on the grooms face!
And the ceremony she went to seemed different from any of those five! She could/should have obviously asked her fiancée but it’s really not so easy in Indian culture specifically to be prepared for everything you’re about to go through.