I went to a Hindu temple for a while when I first got into tech sales to connect with the large number of Indians working in the USA in the tech field in the USA. I don't believe in God for the record but they still welcomed me into their place of worship knowing that. This was was over 20 years ago. They were mellow in the same way your group seems mellow.
I remember men and women sat on opposite sides of the room even if they were married. We sat on a rugged floor--it so was clean in that place. Cleanest rug I ever sat on.
A lot of drums in the music pieces. they said rei a lot --I may have misspelled it but it sounded like the English word ray. It was used a conformation by the audience when they read from the Bhagavata and other Hindu literature.
Christianity plagiarized a lot from the Hindu religion (which is much older) so parts were easy to follow and most of the sermons were in English. Like Christianity they expressed sermons from parables in their texts. However is was a much more mellow sermon. Nobody yelling or threating the congregation. No shaming either. Really a judge-free zone.
They had rituals where we ate part of a banana and a nut. I don't know what that symbolized. At one event they made food for everyone. It was really spicy. Obviously we ate outside because the inside was so clean.
Sometimes they spoke in Hindi. One of the people I went with was studying Hindi in college and would give the loose gist of it. It was often more parables from various Hindu writings. They hardly spent (at this temple) any time on life after death--reincarnation. It wasn't a predominate topic in the way that Heaven is in Christianity. It made me wonder if they culturally worried about death as much as Americans do or if they had a healthier attitude towards end-of-life when contrasted to most Americans.
Because I was in the USA and most of the people in India were here on work visas they were often really educated. I wondered if in India, if Brahmins mixed with Kshatriyas with Vaishyas with Shudras. The artwork was stunning and the temple must have cost millions to make.