First of all go to https://www.myetherwallet.com/#contracts so you can interact with ESH contract

In the contract address field paste : 0x52161ab56f3eFcAAd778C186Dcd3ae56598d1F40

Copy the ABI code from https://pastebin.com/qPzTvuHY then paste it in the Contract ABI field

Click on Access then select the 'Mine' function from the dropdown menu and login to your MEW account to confirm transaction. Set gas limit to 200000 or 87163.

Once you have called the 'Mine' function , you will immediately receive 1000 ESH in your wallet.

Now to add ESH as a custom token on MEW simply click on the 'Add custom token' button on your account and put our contract address (check above) then Symbol is 'ESH' and Decimals is '18'.