Stake (delegate) your ADA to ADA-StakePool to start earning rewards.
Rewards are paid automatically and directly to your digital wallet at the end of every epoch (every 5 days). First time delegating will take 3 epochs to receive rewards (16-20 days). Search for “ADASP” in your wallet to delegate to ADA-Stakepool.

You can delegate using:

Daedalus Wallet
(Desktop, full-node wallet, longer setup)
Yoroi Wallet
(Web-based, “lite” wallet, instant setup)
Yoroi Mobile App (Apple iOS or Android, “lite” wallet, for mobile)