IS, it is good for my baby

My baby 20month!
個性比較主動,活躍,坐唔定!
基本可用英語溝通!----So,I think IS is good for her?

記憶力强,學嘢快,理解能力亦不俗!
但脾氣較差!----還是選擇傳统學校,for discipline training?

另外,如入ESF ,日後到英國升學,是否合適呢?

本人對IS了解不多,有勞各家長提點!

Thanks