Como eres is always talking about the state of you, like number 1; I’m scared.
Como eres tú is asking about your features or what you look like.
Estoy is used for your feeling / state of yourself.
Soy is used to describe yourself.
Answers:
1. Estoy timido.
2. Soy amable.
3. Estoy feliz.
4. Soy bueno(a) > gender matters with this adjective so use a for female and o for male.
5. Estoy bien, muchas gracias!
6. Soy alto(a).
7. Estoy cansado(a) de escuela.
8. Soy terca.
9. Estoy introvertido(a).
The only thing is beginning with Soy, depending on the teacher some teach Spain spanish so you would begin with Yo soy. Check previous lessons to see if that’s what your teacher looks for. Enjoy!