Good writing, Manas, you are really making progress.
I have spent half of my life in India and I have always found India's obsessive prudery all-too Victorian and very much an example of class-based entitlement.
But there, it might be a product of faux colonialism, the weird thing is that for most North Europeans, contrary to Victorian standards, nakedness is no issue at all, while the Victorian "modesty" has become part of the mainstream Indian culture firmly and strongly. Therefore, kudos to you!, for your courage to drop the "shame" and blend in and be human sans gêne.
In Japan, onsen is a key part of the experience. Once onsened, forever onsened: Now that you have taken the first step I am predicting you will love this for the rest of your life :)