I am sorry you are struggling, I have had anxiety and depression since I was 13, so for 12 years now, so I know how much it sucks. Vaping has helped my depression, to a small degree. The anxiety not so much, it doesn't make it worse, but it
That being said however, I starting vaping as a way to replace 'stress smoking" and hookas. I don't know for sure if I was ever addicted to the nicotine. I tend to lean towards no, but I already had the association of inhaling and exhaling something relaxing me, so I'm unsure if vaping would help anyone without that association. I also vape mostly 0 nic with 3mg when I'm particularly stressed.
I have tried many prescriptions for both my anxiety and depression and none of them ever really worked for me. The best things I have ever done for them was learn what triggers my anxiety and ways to cope with it. Meditation, eating well, and exercising have also helped tremendously. I still have anxiety and depression, I always will, but they are better than even a year ago. Also 20x better than in my teens.
No one can tell you what will or won't help you, but I can tell you my experience. Also if you or anyone else ever needs to talk feel free to message me.