HELP REGARDING NAT.

So i need help regarding nat.Mera nat is on 19th july (pre engineering bg) aur accounts and finance ke lie .matlab i have 7 days for preparation.uper sei mein pehli dafa dun gi so i don't know anything about this. can anyone help regarding this. Ke test kitna hard hota aur imp part konsa hei. kia kia ata and how to prepare koi resources?jo jo pata hei btado koi PLEASE.