Mental health problems are concerning me about my '23-NB' relationship with '26F'

Hi all, I've '23-NB' started a relationship with my coworker '26F'. I'm having trouble with the idea of making the relationship official as I have been struggling with my mental health for years and my anxiety and disregulated mood have affected all of my previous relationships. I've recently been diagnosed with ADHD, started meds and am in regular therapy. But I'm still worried about making the relationship more serious and affecting her, or making my own mental health worse. I'm wondering what you would all do, she says she's willing to wait for me to figure it out but I don't know what to figure out, or how to proceed from here. Do I nip it in the bud now, or continue pursuing something that I'm very anxious about?