I'm so confused about the exposure part of ERP

I'm thinking of trying some ERP on my own while I wait for treatment, but I'm having some trouble knowing what is a compulsion and what would be good exposure. For example, I have huge fears of being a narcissist and/or a generally bad person. So whenever I watch a movie or read something that has an evil character in it I automatically compare myself to that character and stress over if I'm like that person. A couple of things I do when this happens is Google other people's experiences, seek reassurance, rumination, etc. Sometimes I'll also google different symptoms of narcissism, freak out over things that I relate to, then get relief over things I don't. So my confusion is, would researching people who have narcissism be an exposure, or a compulsion since it's something I sometimes do during a spiral? Or, would the exposure be watching movies/living life hearing these stories, and refraining from the spiral of rumination and no Googling at all?

Hi! I've been on my OCD healing journey for about half a year and I have seen a lot of success. I'm reaching out for advice, I am very willing to do exposures because I know the more I do them, the more I get better, but I struggle with the response prevention part. I don't know how to control my brain when it comes to facing the fears especially since most of my compulsions are mental. I can tell myself the typical things "I am okay with the uncertainty of this happening", etc. but its like my brain doesn't believe them. I've been stuck in this disconnect for a while and would love advice you have heard from a therapist or learned that has really help you.

My NOCD therapist (who has been awesome) and I are both struggling to identify ways in which I can practice exposure therapy while in-session, because the vast majority of my OCD symptoms are mental compulsions. For example: indecision and inability to commit to a choice; seeking reassurance on decisions from friends and family; mental review of things that have just happened / social situations; over-thinking and catastrophizing. I also have some other hallmark symptoms (contamination fears, moral scrupulosity, etc) but those tend to be inconsistent too. It’s hard to really practice these during my sessions because so many are in the moment and fleeting. By the time I join my session they are no longer active. How can we establish exposure responses during my sessions, if most of my OCD involves mental rumination and overthinking patterns/thought loops that only occur “in the moments - rather than specific or consistent compulsions (such as hand washing)?