This reminds me of Rosario + Vampire Series but with a Female Protagonist instead and with Xianxia elements!
For me this novel remind me Love Monster manga. Both mc go to monsters school after fail at their exam. The only difference is mc mother is immortal goddess and father is human. Love monster mc father is immortal God and mom is human.
all else aside.. you're everywhere mate. i am genuinely hounded by your avatar everytime i come to the pick up forum