Lovingkindness & Contentment- from radiating the feeling to yourself, to a friend and to all directions and all beings. Contentment is contemplated.
A complete guide to the meditation the way the Buddha taught: https://www.thepathtonibbana.com/
How to practice Metta/TWIM Meditation https://www.dhammasukha.org/beginner-lovingkindness
What are the 6Rs https://www.dhammasukha.org/the-6rs