So how do I get a mantra that is particularly suited to me, and where do I learn how to use it?
There are a lot of meditation instructors available. I’d say research, research, research and find a source with which you feel comfortable.
There are many differing styles as well as belief systems about meditation.
I was attracted to the particular style of meditation that I taught and still practice because it made sense to me. It had a logical progression that seemed valid in theory and continues to prove itself through long-term practice of over 35 years to date.
I learned how to meditate and went on to become a certified instructor of the Transcendental Meditation Program as taught by Maharishi Mahesh Yogi. He formulated the technique and brought it to the western world based on teachings he received from his teacher, Swami Brahmananda Saraswati, Chankaracharya of Jotir Math. The technique is based in ancient Vedic knowledge that has been around more than 5,000 years.
The mantras are chosen by the teacher for each student; one-on-one. The mantras are used for their vibrational quality, not a meaning, and are specifically chosen for each individual based on various parameters. Leading to the next question: