Change -ewal to your wallet address. Worker name and e-mail are optional.
Change -epsw to your worker password (if you have one).
Adjust -cclock, -mclock and -tstop to clocks and temperature that you are comfortable with.
Always monitor temperatures and hash rate. Don't let your GPU run at high temperatures, this will cause damage to your GPU and monitor hash rate because if your hash rate is lower than usual you might have to restart the miner or reset your GPU-drivers.
You are good to go! Here's a Equihash GPU hardware comparison I wrote earlier, in case you don't have RX 4xx GPU. STEEMIT POST
Note: Remember that adjusting voltages of your GPU might fry the hardware. Never adjust voltages if you're inexperienced, read up on overclocking before experimenting. Here's my 280x overclocking guide