OP I have a similar (not same) background that led to almost identical concerns. I was petrified and also needed to know EVERYTHING.
I want to let you know that my first birth was amazing. On paper it wasn't, there were complications, but the way I was treated made me feel incredible. One thing I'd never considered (and i thought I'd looked at Every. Single. Option!) was that (possible TMI) me getting a baby out of my vagina afterwards felt like I'd taken back control of it. It was mine. I did that! Nobody did it to me. I kind of felt reborn.
So what made it good for me was having one-to-one care for the duration of the pregnancy and labour. I was abroad, but the equivalent care in the U.K. would be a home birth with a midwife you trust. A doula there too would be good.
I'd highly recommend speaking to some doulas - you want someone who makes you feel comfortable (like a good therapist does). There are also doulas who will work in hospitals and the advantage of that is she's with you the entire birth and she knows you and knows what you want and don't want. This also takes pressure off your birthing partner.
And I definitely agree about giving ALL info about triggers etc to midwife and getting any perinatal mental health care listed on your notes. You basically can't have too much down there!
I wrote a birth plan in bullets with red, bold capitals about the things not to do. And what to not do (touch me) if I started having flashbacks.
And I'd also recommend Ina May Gaskin's Spiritual Midwifery or Guide to Childbirth because if you want to arm yourself with all the options and have all the info, then you need to know what can cause things like a "cascade of interventions", which I detect is something you don't want (nobody does).
Penny Simpkin's When Survivors Give Birth is excellent too, but it's more intended for practitioners (which you may like!).
But, I have to admit, I was so stressed by it that I didn't read a single book while I was pregnant! I read parenting books instead!
And if you aren't doing it then I'd highly recommend EMDR for triggers that may get provoked during pregnancy/labour/birth. I did EMDR later and in hindsight wish I'd known about it before. There are many things that can impact a birth and stress is one of them. Removing any stress possible is something I'd definitely recommend.
And if ELCS is for you then go for that. I'm not suggesting you shouldn't, more that there can be something very positive that is never shown in the horror stories about birth. They happen and they're horrific (whatever type of birth), but there are also some very good experiences that are rarely spoken about and never shown on TV because they're not dramatic.