need advice

Howdy. Pretty unexpectedly, I've been offered a spot at this clinic focused on psychotherapy, the young adults ward specifically, for next Wednesday. I was told usual wait times were about half a year. All things considered, I'm incredibly lucky to be getting a spot for treatment this quickly...

I've been depressed and self hating for many many years and it has gotten so so terribly bad recently. I've finally decided I want to start and try to recover/be better/idk how else to call it, but I have no idea where to start. I don't have access to therapy at the moment, especially due to...