Tim’s teachings on the 37 Practices can be found - here This is a series of 17 talks staring on October 10, 2022 - “Introducing Lojong - The Tradition of Mind Training
The root text of The 37 Practices of a Bodhisattva is - here
Dzigar Kongtrul Rinpoche’s Teachings on the 37 Practices of a Bodhisattva - October 2022