I don't know if you have that but I used Kelofribase with my surgery scar and it is now (3 years old) almost compleatly invisible. I have an Amazon Link here I hope it works.
Normal handcreams should help, too, with getting the scar tissue softer and lighter, but there will almost 100% always be a mark. I will say it too, it was suggested many times. Think about a tattoo! It can be your answer to what happended and may help concluding with that chapter, i mean like "ok that happened, it was horrible but i survived it and therefore i am stronger than they thought i would be". I know its cheesy and doesn't work like that, but i don't know how to better describe the feeling. I have one too (not over a scar but und my wrist) which I got after a horrible time similar to your past. When I see it, it doesn't remind me of what happened, but that i survived that sh*t and that I can survive everything the world throws at me.
You can do this, you can heal, and that scar will not hold you back. You are very strong. Don't forget that.