Help mehhhhh

Look it's already oct ans I haven't studied anything thinking half yearly ke baad start krungii but ab bs 3 months left and idk what to do baki sb to me krlungiiiii butt maths mera maths me hamesha 30-40/100 aata he actually 40 bhi ny jaota and maine abhi bhi kuch nahi padhaa! Too can you suggest mee what to do to get atleast 50/80 any yt and teacher any book... I have oswal maths question bank actually and I guess if I should study by shobit or ritik sir idk or anyone else..