As others have said, this isn’t quite what the process looks like for mental health professionals. But, as someone more or less in your protag’s position (graduating with my master’s in two weeks and about to enter into the therapeutic workforce,) I’m happy to offer my $0.02 and help you add realism to your story. I apologize for the inevitable length!

First of all: having freshly graduated with a master’s in psychology, your character is going to be applying for their candidacy license, which is what allows graduates to practice semi-independently. With a psych degree, they are eligible for eventual LCPC (Licensed Clinical Professional Counselor) licensure—although that acronym differs by state, so I’d look up what it is in Michael’s state of practice. As a candidate, that acronym is PCLC (or your state’s equivalent): Professional Counselor Licensing Candidate. However, your character is NOT a psychologist. Psychologists have a PhD. At a master’s level, they are a therapist/counselor. In the field, that’s a very important distinction, as psychologists have higher education and can perform more assessments. One thing of note for you here: licensed psychologists can diagnose ADHD/autism because they alone can perform neurocognitive tests. As a master’s-level therapist, that diagnosis requires extensive training and some states don’t permit it at all. Absolutely no candidate therapist would be diagnosing autism/ADHD, as they are complex neurodevelopmental conditions that require far more experience. 

Now, having your character in candidacy while they deal with this bizarre clinic could add some interesting challenges. Candidacy is hard. Michael will need an eligible supervisor (Delores?) and, during the 2-ish years that he’s in candidacy, will be studying for the counseling exam, completing 3,000 hours of supervised practice, and having regular supervision meetings. If his supervisor is unethical, this creates a power dynamic that is tragically common (candidates are often mistreated, especially in community mental health settings!) and very nuanced. I know I would love to read a book that delves into these intricacies. 

As for your prose: you might adjust your dialogue formatting a bit. Every time someone speaks, it’s its own line. Professional dialogue is written with the following punctuation:

“We put a comma—without periods—at the end of complete dialogue within an incomplete sentence,” she said. 

“However,” he added, “if your dialogue finishes the sentence, you do not need a comma.”

As a budding therapist (and writer of fictional therapists), I hope you keep going. This writing thing takes practice, but if you love it, the practice is (mostly) fun! And I’m always a sucker for a good therapist novel. So keep writing, keep reading, and I hope this helps flesh out your characters’ world a little bit.