Guys if you can help, your few minutes can change my life, so pls help

Ok so after 10th meri halat bhut kharab hogayi, me dummy school me tha isliye mene kbhi padhai nhi kri ncert ki aur na hi mene 12th boards ko itna seriously liya kyuki mujhe lagta tha ki jese 10th me last me pdhke ache agaye wese 12th me bhi ajayenge. Pehle me jee ki prep krne wala tha par fir mene jee ki prep nhi kri aurr abroad jane ka socha. Fast forward to 12th end mene kuch nhi padha 2 saal, jab boards aye tab mene last last me padha aur mere 2-3 subject me ache marks bhi aye par me maths mai fail hogaya, Uske baad mene compartment ki prep start kri par tab mere mummy ko cancer hogaya(ab unki treatment complete hogayi aur sab theek hogaya) aur me andar se puri tarah tut gaya aur compartment bhi pass nhi kr paya. uske baad mene nios me admisson leliya and october me uske exam dediye. 4 subject ka exam diya and english ke marks unhone transfer krdiye, wese to phy and chem ke bhi transfer krwa leta par fir unhone bola ki aghe admisson me dikkat ayegi. Mera abroad jana bhi cancel hogaya aur uske baad mene apne apko sudhar ne ka socha and mene jee 2025 dene ka socha. Par uske baad mere dadi ji ki death hogayi aur me andar se aur bhi zyada tut gaya kuch samajh nhi a rha tha ki mere saath kya horha hai. But itna sabkuch hone ke baad bhi mene himaat banaye rkhi. Par uske baad mujhe dengue hogaya, 10-12 din hospital me admit rha, aur uske baad bhi puri tarah recover krne me mujhe 1 month se zyada lag gaya, aur ab me puri tarike se himmat har chuuka tha,fir november me nios ki exam hui vo dedi. Par ab mujhe doubt ho rha hai ki kahi nios future me problem to nhi krega, to ap log pls mujhe suggest kro ki kya mujhe maths ka 2nd compatment dedene chahiye cbse ke? aur kya me abhi elegible comp dene ke liye after doing nios? agar me maths ke comp me pass hojata hu cbse me to mere overall 70+% banjayenge, aur mere chem me kam marks the to kya saath me chem ki improvement bhi de sakta hu? agar usme thode bhut marks bhi badh gaye to 75+% banjayenge cbse me. Aur guys pls jee ka bhi kuch suggest krdo meri 29 ki shift hai to mujhe sirf 80-85%ile chahiye us se zyada nhi chahiye. Pls help krdo guys ab mujme bilkul himmat nhi bchi kuch krne ki, par firbhi try krunga agar kuch hojaye.