@choirmom I bought it too, and got extremely frustrated about the fact that it was really just a pdf - no videos, nothing else. Although yeah, I guess that's on me for just relying on reddit reviews. Also, like you, my PT therapist told me to take it easy on the pelvic floor exercises, as mine is actually too tight from a mix of stress and exercise.
Right now I'm doing NourishMoveLove on YouTube, as it targets exactly the muscles I need to keep from developing hip pain. The lady (Lindsay Bomgren) is veeeery energetic, but oddly enough it works for me. "You can do anything for 20 seconds" is starting to be my mantra. I don't think it works for everyone, but it seems my groove at the moment is to have a loud American lady yell "Holy Bananas" at me!
Edit because I forgot: I stopped worrying about Diastasis Recti after reading "Expecting and Empowered" by Emily Oster. Basically, according to teh book (which reviews existing literature on common pregnancy rules) there's very little evidence you can do anything to trigger it (exercise or no exercise, including abdominal exercise) or prevent it (same). If you already have it, it's a different issue, then you might have to adapt (I haven't really looked into resources I'm afraid) - although the only small study that exists on it suggests abdominal training makes it better, not worse.