I think CBT gets a lot of unwarranted praise compared to a lot of other therapeutic approaches. But before we say it isn't working. . .
Reading into things a great deal likely won't cease all that much until your medication has kicked in in a way that has diminished both your mood symptoms and your psychosis symptoms.
A therapist is probably a much better way to do CBT type stuff than on your own. Back to the beginning, a therapist likely won't have an opening to work with if you aren't approaching stability regarding mood and cognition. Most often , regarding bipolar w/ psychotic symptoms,the stability to do therapy comes from taking meds that one tolerates and that work for a period, and having good results. After some stability, then perhaps therapy. IME anyways.