What is the best type of yoga for a 58 yo beginner

58 y/o is a good age to start practicing yoga. I recommend you to attend yoga classes where a teacher can help and guide you in your practice.

http://s3cr3ty0stg2.wpengine.com/Yoga-for-beginners/How-do-I-start.html

http://s3cr3ty0stg2.wpengine.com/Yoga-for-Seniors.html

Blessings