[valsalva.org](https://valsalva.org) here is the website, it have general information... what i did was that i bought a book of william parry valsalva hypothesis (4th edition), read it and started applying those concepts and exercises daily,.. you have two options 1.Either take a therapy from william parry 2.Or you can buy a book (everything in explained in book and start doing yourself) after buying book if you have question, hit me up. i will surely help you