This is a fairly general question for a very specific topic.
The industry is and has been growing by leaps and bounds for years
There are “new” workouts/trends constantly being “invented”
There are sub certifications being offered albeit not mandatory (at least not Nationally Accredited ones!)
So to take bits and pieces of a concept without fully understanding the whys or reasons can be very risky
My suggestion would be to be certified with a Nationally Recognized Organization and then to constantly learn, take your CEC’s and stay on top of everything. As you evolve you will be comfortable adding elements in.