You can make money from DeFi when you lend out your coins and earn interest on it. To do that, you have to create an account with an exchange and buy ETH. After that, download MyEtherWallet(MEW) and withdraw your ETH to it. You will now go-ahead to swap your ETH for DAI. You can use DEX.AG for that. Now that you got some DAI in your wallet, you can supply it to any lending platform and start earning profits on it.