u r feeling inconvenient cz u have touched this subject first time
just do one thing ,take guide from a student or teacher only one or half month
study half an hour from a science teacher or student who is aspiring for css
science books of urdu medium school in 8th class,9th class they will make ur basic ideas clear
keep a science dictionary to u
dont worry ,work hard few days ,science is self exploring
u wil find ineterst
Thanks
zaman from UET lahore