According to your present academic results, its okay to get into some band 1c schools.
According to the following website, and the EDB website,
http://www.squarefoot.com.hk/chinese-hk/school-network/secondary?district=8
佛教大雄中學 and德雅 are only a band 2 secondary school!
You can definitely get in.
You could try some band 1c secondary schools too when you have the ability to! (:
These are the band 1 schools in sham shui po
中華基督教會銘賢書院 男女 其他 基督教 Band 1 匯基書院 男女 其他 基督教 Band 1 寶血會上智英文書院 女 其他 天主教 Band 1 聖母玫瑰書院 女 其他 天主教 Band 1 長沙灣天主教英文中學 男 其他 天主教 Band 1 香港四邑商工總會黃棣珊紀念中學 男女 其他 無 Band 1
hope i can help