https://ethereum.org/en/eth2/staking/#stake
It all depends on how much you are willing to stake. You'll need 32 to become a full validator, but it is possible to stake less.
To begin the staking process, you’ll need to use the Eth2 launchpad. This will walk you through all the setup. Part of staking is running an Eth2 client, which is a local copy of the blockchain. This can take a while to download onto your computer.
If you’ve already followed the setup instructions on the launchpad, you’ll know you need to send a transaction to the staking deposit contract. We recommend you check the address very carefully. You can find the official address on ethereum.org and a number of other trusted sites.
r/ethstaker is a community for everyone to discuss staking on Ethereum – join for advice, support, and to talk all thing staking.
Staking is what you need to do to become a validator in a proof-of-stake system. This is a consensus mechanism that is going to replace the proof-of-work system currently in place. Consensus mechanisms are what keep blockchains like Ethereum secure and decentralized. More on consensus mechanisms
Proof-of-stake helps secure the network in a number of ways:
Because you have to stake your ETH in order to validate transactions and create new blocks, you can lose it if you decide to try and cheat the system.