We are currently available on OP Sepolia and ETH Sepolia testnets, so you will need test tokens to use the Veilnyx application. Below are some useful faucet links where you can obtain test tokens.
In "Write Contract", connect your wallet, select the "deposit(..)" function, enter the ETH amount you want to deposit, and hit the write button. You can then claim the WETH tokens by adding WETH token to your wallet on ETH Sepolia.