Starting CSAT - Should partner have different therapist?

I found a CSAT therapist, and I told my partner about her. He made an appointment. And I also want to see a CSAT therapist. Just to be clear, we are starting with individual therapy first. Should we see a different CSAT therapist or the same? And when we start doing couples therapy, should we see the same therapist that one or both of us has individual therapy with? Or different?

Sorry if this is confusing and I’m overthinking it. Just basically want to know how many therapists we need to involve for individual and couples therapy.