Go to https://app.aave.com/
Connect Rabby Wallet (recommended)
[Optional] Select chain with $USDC deposit in Rabby Wallet (e.g. Optimism)
Click Supply on the right side of $USDC
Enter amount of USDC to supply
Click “Approve USDC to continue”
Sign and Confirm in Rabby Wallet
Supply USDC
Sign and Confirm in Rabby Wallet
aToken could be “Add to wallet”
“Add” custom token to Rabby
Review USDC supply on AAVE Dashboard