Or maybe you have the same as this misconception about the merge:

https://cointelegraph.com/news/the-merge-top-5-misconceptions-about-the-anticipated-ethereum-upgrade

Misconception 1: Ethereum gas fees will reduce after The Merge
Misconception 2: Ethereum transactions will be faster after The Merge
Misconception 3: The Merge will result in downtime of the Ethereum blockchain
Misconception 4: Investors will be able to withdraw staked ETH after The Merge
Misconception 5: Validators will not be able to withdraw ETH rewards til the Shanghai upgrade

Others have provided you a good link to start with. So it's better to read them first and understand everything. There are also a lot of threads here in this board. It's not that deep, as there are a lot of recent threads about the Merge.