I am new to Unity and I almost know nothing, but this will force me to learn a lot and that is the most exciting part about this.

Btw can anyone tell me how this works like when it starts, the time limit etc. Thanks:)

Super exciting! This Jam is running from August 22nd - August 29th so you have a full week to make a game! A great tip is watch Brackeys tutorials! They'll help you learn a lot of stuff for new starting out game devs! Good luck to you! :D

Well, you still got time to prepare for the jam. Brackeys' has a lot of tutorials you can use to make any projects you want. On August 22nd, the jam starts and the theme is announce. You then have to make a game based on the theme. then on August 29th, it's submission day and you submit what you got. as simple as that. Though don't force yourself too much and risk your wellbeing. Do what you can, learn more and prepare for another game jam.