Within a couple of days I was able to chant 64 rounds

www.prabhupadaharinam.org
In '22, I joined up with the Hare Krishna movement and started chanting the Lord's names on my own. A devoted friend helped me get in touch with one of guruji's devotees, who then got me in touch with guruji. With guruji's blessing, I could chant 64 rounds and I upped the number because of his guidance. Chanting with a pure devotee makes it easier and more effective than me doing it alone. While living with guruji, I saw he stuck to his spiritual practices, like going to bed early, getting up at 2 am, and doing yoga postures and pranayama to stay in shape. Guruji said it's important to do your best, no matter how many rounds you can chant, cuz Krishna can take you back to Godhead with His mercy. Srila Prabhupada told his disciples, and those he got into Krishna consciousness to chant 16 rounds, but it's good to check in with a bona fide spiritual master for what's best for you.

64 Rounds maha mantra
laksa naam