Ketamine treatment for depression in Germany

Hello everyone,

TL;DR:
Am chronically depressed and meds have not worked in many years of trying. I am interested in Ketamine therapy and looking for people who have undergone it in Germany, whether at their doctor, at a clinic..

Without going into too much detail, I suffer from chronic depression (started when I was a teenager and I am closing in on 40 now). The past few years have been hard and I’ve had close to no relief, having nasty side effects from the various medicines that were prescribed to me.
Right now I am off meds since my doctor said I’ve already tried so many meds that there isn’t much change of getting results and that he is afraid to prescribe anything else right now. He said my best chance is going to a day clinic or a hospital to be administered a cocktail of meds under constant supervision of doctors.

I feel like if at least the full on anhedonia would go away, I’d be able to regain part of my life…But at this point it feels like there is no point in living since all I want to do is stay in bed and sleep. I’ve been forcing myself to do things for weeks hoping that it will go away but I feel zero pleasure from pursuing my many hobbies, from eating (I am/used to be a huge foodie), from orgasms, from other basic things …

The thing is, I have been reading on Ketamine therapy and how it has some chance of success (around 35-50% to my understanding). The long term effects are not fully studied yet as far as I can see, but the short term improvements and fewer side effects than some of the insane medicine cocktails I am reading they administer for treatment-resistent depression in clinics. I would like to bring this up with my doctor (but there is some time until my next appointment and I am not able to contact sooner)
On the TK site I have read the following – “Recent studies indicate an antidepressant effect of chemically processed ketamine. Nasal sprays with the active ingredient esketamine are approved in Germany and the USA as a remedy for acute therapy-resistant depression. The mechanism of action is still being researched further. The sprays are usually combined with other antidepressants, since the long-term effects have not yet been adequately documented.” (google translated from https://www.tk.de/techniker/gesundheit-und-medizin/behandlungen-und-medizin/sucht/ketamin-2015846)
I also know that there is Ovid Clinic that uses IV ketamine + psychotherapy in Berlin but it is quite costly (expected a cost of 4k).

Additional info:

I have not tried therapy as an option in the past years and right now I have been struggling to find a therapist due to not being able to express myself well enough in German. I also do not expect that the therapy will solve the full on anhedonia I have been left with after my last failed medication (I feel like something broke in my brain’s “reward system” that might need a chemical solution sadly).

Questions:

Do you know anyone who has gone to this clinic in Germany or has had Ketamine treatment recommended for severe treatment resistent depression? Was the person reimbursed by statutory insurance? Do most psychiatrists here even know about this treatment? (I know that doctors are not forced to continuously educate themselves and follow advances in the field in all countries and this is a rather new treatment solution that is still in the works.)

Thank you very much for taking the time to read this post and for any insight you might provide.