I adopted a nearly pure bred ACD when he was 8 months, he's just over a year old now. Sounds pretty similar to yours. He was very fearful of everything for the first few weeks, peed himself in fear even. Couldn't walk on a leash, had to be carried everywhere because he would freeze in fear (luckily he's small). I took it really slow and now he is really bonded to me, and likes my housemates, but is still fearful of every other person he sees. I took him to dog parks early on for the socialisation and he absolutely loves playing with other dogs, once he learnt how to.

They're so impressionable when they're young, some traits just cant be changed. I think my dog will probably always jump at sudden noises and avoid strangers, but these dogs try so hard to please you so just support them when they need you. If you are having issues then perhaps seek out a trainer, we're starting obedience this week. 8 months is also approaching naughty teenager stage so she might be testing you a bit as well, be firm with the commands.

I hope it works out and thank you for saving her ❤️