I'm a single adoptive mum, I chose adoption over any other route of becoming a mum
I would say that when choosing your route to parenthood, whatever it is, it's important to just be brutally honest with yourself about how you feel, what you want, your expectations etc. I think it's also important to be selfish - as in, not to feel guilty about wanting something that feels 'me-centric'
I would say the first question is how much do you want to experience pregnancy, giving birth, having a newborn baby, and how drawn do you feel to the idea of your child being genetically yours? If you would really like to experience any of that, I think it's nearly always the better idea to TTC. Adoption does generally require you to have 'let go' of having a/another child by birth and all that entails.
If you're comfortable with not experiencing pregnancy, tiny baby etc, then adoption can be very much on the table
And it IS a scary undertaking! Everyone who goes through the adoption process has worries and fears and that's totally normal. In fact, it would be very odd to enter something as unknown and life changing as adoption and not have worries and wobbles!
Ultimately, it's a leap of faith. All parenting is of course, but adoption often especially so. Only you can know whether you feel ready to take that leap.
I know plenty of teenage and adult adoptees who haven't chosen to live with their birth parents, and would never be interested in doing so
I also know/know of a number who have chosen to live with their birth parents sometime in their teenage years
My 18 year old lives with her birth family now. She's still very much my precious daughter though
But I'm not sure it's helpful to think on these future 'what ifs'. When you are a parent, you love your child more than anything, and you find a way to cross these bridges as, if and when they arise.
I know children who have been remarkably unaffected by their traumatic experiences, children who have been but to a less serious degree, and children whose lives have been more severely impacted by their early childhood. You just don't know how your child will be affected as they grow and develop, when you adopt them. I've found the tougbest times in my life through parenting, but also some of the happiest and definitely the most fulfilling. Lots of joy, and lots of tougher things.
If you can reach a place where you feel you can take that step into the unknownn and say 'what will happen, will happen, and I will deal with it as it comes', then you are ready to adopt.
Naming is a common concern by the way. It depends on the child, but with most young children, you can at least add a new middle name. It's someting you deal with as you go through the process IMHO
If you're leaning towards adoption, then do come and post on adoption. We don't try to misinterpret anything, we really want to be supportive and helpful to everyone posting 
There was a similar thread here on AIBU a month ago about being single and choosing which route to go, maybe you'll find useful posts on there too?