Hi, Seps26, man, can I relate to what you are saying. I dealt with insomnia for 40+ years (does not mean you will, I had major unresolved childhood trauma etc.), and I used to envision insomnia as a powerful giant, and little me with no chance.
You mention depression. That will contribute to insomnia bigtime. Situational depression solely because you can’t sleep is one thing; major clinical depression is another. If there is any possibility of the latter, mental health treatment could help. This can involve antidepressants which can help with sleep—although no pill will ensure good sleep indefinitely. If it did, you would see a mile-long line at the pharmacy.
Suggest you keep exploring this website. Martin has a number of videos and emails which address various issues. One in particular which might fit your situation: our attitude about sleep. CBT can address this.
Do we have the attitude that sleep as a natural process, as in the body eventually gets hungry, so you eat; the body eventually gets tired, so you sleep. Or do we try to control it and freak out when sleep does not come. (one distinction: to resolve hunger, you have to do something, i.e. get something to eat and eat it; re sleep, the body just sleeps if we can get out of the way)
Finally, the huge difference between observing thoughts or living in them: “I am having the thought that I cannot sleep and my life is ruined,” or “I cannot sleep and my life is ruined.”
Take care. Easier said than done, but try to give yourself a break. It’s a tough struggle. It is really easy to go down the rabbit hole of despair when we can’t sleep. But you are not alone, and you are not—not—sentenced to a lifetime of insomnia.