Best thing is to inform yourself about bitcoin as much as possible before actually investing.
Bitcoin's Whitepaper published by Satoshi Nakamoto in 2008 is fundamental to understanding bitcoin and blockchain technology. If you want to learn about bitcoin in simple terms and understand the bitcoin whitepaper in urdu/eng, This is one of the best sources:
https://www.youtube.com/watch?v=VmusvimRKWkHope it helps!