can anyone teach me oc ? haloalkane % haloarene

starting my organic chemistry from now. can anyone please teach me the first chapter haloalkane and haloarene ? it would be very helpful to me.

I had tried it to watch from yt but upar se nikal rha tha.

I want cbse level.

madad karde bhai 15 din me boards aaye or maine suru bhi nhi kiya. reposting this on teenagers group.