For myself, reading stotras and chanting mantras pretty much blasts me inward to the 'I'. Read the Ramana Maharishi's book - "Who am I", to understand what I'm talking about. Chanting the mantras of Hari (which I do throughout the day) has helped me free myself of addiction - in particular to porn. Lust is greatly reduced.
Therefore, from my own experience, there are immediate, tangible benefits. I just have to be present, stop thinking about stuff, and chant the mantra in my mind, and right away, my eyes close, the tongue cleaves to the roof of the mouth (kundalini), and I'm pulled inward to the 'I'.
Hinduism and Buddhism are kind of complementary. Study Buddhism and Advaita vedanta while also using the worship of Hari, and his mantras.
Keep in mind that you may have to avoid ejaculating to experience such things, even if you have sex. Swami Ramdas (https://anandashram.org/) said, in order to experience bliss when chanting Rama's mantra, one has to stop indulging in lust.
Moreover, you've taken that quote from the Mahabharata out of context. Vidhura was referring to the follies of Dhuryodana and Dhritrashtra when he spoke so.