There are some free resources out there if you want to try them first. I like really like PEP
https://pepparent.org/
And also try
https://consciousdiscipline.com/ — they both have a ton of webinars, book lists, etc that I’ve felt are helpful
I’ve learned that a lot of it is getting a better understanding of toddler development and giving her more support to meet her where she is at. For ex we no longer have fights around mornings or bedtime because we have a specific routine, charts on the wall, etc.
I do love Big Little feelings podcast so I imagine the course is helpful! Another podcast I like is Mr Chaz’s Conscious Discipline