As other users have already answered, when in doubt, always fact check claims with medical studies. The phrase "I practiced the exercises for a few months and got where I am today!" should raise some alarms.
A quick search in Google Scholar will give you scientific studies providing several therapies that worked well for TMJ/TMD patients. Nick Yiannios has some research studies and a YouTube channel with testimonies of patients all over USA coming to his clinic.
This article on acupuncture for TMJ quotes a medical study that achieved >90% success rate in relieving the symptoms of TMD long term, giving a guide on how to stimulate the same acu-points than the patients who participated in the study.