Advices for a Teacher Training beginner

Hi all, I'm a software engineer, taking reformer classes (on and off) over 5 years. I'd like to deepen my knowledge and even become a professional trainer at some point. I'm looking for teacher training programs but I don't know where to begin. I had classes from various teachers with various reformer machine. To be honest I wasn't aware of the different pilates styles until I start searching for the training programmes. How did you choose the style you like to get trained? Are there huge differences between training styles? (I'm based in Netherlands, in case you have any local tips for me) Thanks, Elo