To become a validator of the StaFi ETH2.0 Staking contract, you need to deposit 4 ETH to generate one pool which will be allocated with stakers' funds automatically. When the amount of ETH in the staking pool reaches 32, the validator can start to stake in the Eth1.0 deposit contract. Finally, the validator needs to run an ETH2.0 node and wait for becoming an Ethereum official validator.