A few that come to mind are tms coaches with a christian bent (Jen Johnson has a YT channel called Thought by Thought Healing), lecturers like Joe Dispenza, or writers like Louise Hay that would be considered more spiritual/New Age category. In general though, focus on the basics...thoughts and emotions...and then apply your own personal belief system around spirituality to the work. This is really an educational approach, not a mystical one, so obtain the accurate knowledge first and then explore it through a spiritual lens later.