Inquisitive

/ɪnˈkwɪzɪtɪv/

having or showing an interest in learning things; curious. 'his poems reveal an intensely inquisitive mind'

Curious
/ˈkjʊəriəs/ eager to know or learn...

Interested
/ˈɪn.tres.tɪd/ showing curiosity or...

Happy
/ˈhapi/ feeling or showing pleasure...