Help me regarding my test

I have test of whole 11th organic except hydrocarbon on 5th September. I don't even know what's there in organic chemistry because I haven't attended single lecture of organic except iupac nomenclature. The test also includes haloalkanes chapter which i don't even know what's there in chapter. I am thinking of watching Yogesh Jain sir Oneshot from YouTube (10 hours one). Should I? I just need 100 /180 in chem.