What certifications can I apply for as a Psy.D. student?

Hi! I'm a 2nd year student in a school psych doctoral program. At the end of next year (so in my 3rd year), I have the opportunity to obtain my M.A. after completing a thesis, which I definitely intend to do. Because the degree would only be in general psych, I think I am limited to what I can do, so I am seeking other ways to boost myself professionally in the meantime that I am in this Psy.D. program. What are some certifications that I could apply for? (e.g., I looked into enrolling with ABPP but it's too early for me.)