feeling out of place

hello!!!
never been in this subreddit, using a fake account because I feel bad using my real one
born in Japan, but I'm not japanese I'm middle eastern-mexican, I was adopted when I was 1? or so, look nothing like my adopted family
I never really used to feel out of place till I really focused on how different I looked, I love my adopted family but I feel completely out of place between them it's like when you visit a friends house and their parents treat you well but you know deep inside you're just a guest to them and they don't care about you on like a motherly/fatherly level?
I can't even write or read japanese and I can only speak because my parents have been sending me to international schools for years, but I'm going to a normal school next year and my older brother goes there AND we have the same name

any tips on feeling somewhat normal? is there any hope I'll one day feel like my adopted parents are my parents and my adopted siblings are my siblings?