I am a crypto newbie and want to learn a bit more about ETH2.0 and staking

Also what are dApps and how are they related to ethereum and what is the process of creating your own dApp?

From my understanding, eth 2.0 will make it more energy-efficient and possibly reduce gas fees and will allow you to stake eth2.0, giving you a 5% API

Can someone explain a bit further on the process of staking?