Julia, your art is simply exquisite, please focus on that as it is healing. Let the things that are making you feel less than adequate and stressing you out go. It's time to take care of yourself. Work on why it is that what other people think of you (JWs and former co-workers) has such power to hurt you. I understand the feeling that everything we do isn't good enough or isn't worth the effort. That is JW programming-- it's the whole everything is "vanity and striving after the wind" thing. I still struggle with that.
I wrote a DA letter, but didn't mail it. That felt good. I also really like the idea of the letter of resignation that was posted here on this forum. It's something to do preemptively without playing by their rules. Do what rebel8 said and block JWs from your life-- disfellowship them! I also worked very hard at deprogramming myself. One thing still on my list of 50 Ways to Leave your Cult is to donate blood. I need to make time to do that.
I'm glad you are looking into therapy. I have a Buddhist therapist. I really like the perspective of Buddhist psychology. I read a lot of books, listened to CDs and took a few online classes by Insight Mediation Society teachers like Jack Kornfield, Sharon Salzburg, Jack Goldstein and Tara Brach. The Interdependence Project in NY City is a good resource for online secular Buddhist teachings. I belong to a local Insight Meditation Society Sangha (community) associated with Yale University and have met some amazing people there.
http://www.dharma.org/
https://www.google.com/webhp?sourceid=chrome-instant&rlz=1C1CHFX_enUS576US576&ion=1&espv=2&ie=UTF-8#q=interdependence+project
Books and recordings that helped me:
Radical Self-Acceptance, by Tara Brach
The Wise Heart: A guide to the Universal Teachings of Buddhist Psychology, by Jack Kornfield
When Things Fall Apart: Heart Advice for Difficult Times, by Pema Chodron.
ETA:
https://www.edx.org/course/science-happiness-uc-berkeleyx-gg101x#.VMex92jF8b0
Watch inspirational talks at https://www.ted.com/talks