जिव्हां कीलय बुद्धिम विनाशय ह्रीं ॐ स्वाहा Have a rosary and use it to monitor the mantras you are indicating. Chant your mantra for as several rosaries as you end up picking. While some mantras do call for initiation from the guru, the Baglamukhi mantra might be chanted by anyone https://www.youtube.com/@Mahavidyabaglamukhi