To get started, just visit the farming page on the smartdex.
Important: Your Metamask has to be set to Ethereum Mainnet!!!
On the page, click on "Deposit Uniswap V2 LP Tokens"
Chose the maximum amount to deposit on the dialogue
Press approve and sign the transaction on Metamask.
Now confirm the transaction in the second Metamask pop-up.
After the transaction got confirmed by the network, you can now hit "Deposit".
Confirm that transaction too on the new Metamask pop-up window.
After finishing the above steps, you are done.