How can I mine ethereum?
You must have a some hardware to mining the ethereum. Best thing you must have is GPU card and you could download minergate software and start it. It will mine the ethereum. It just a simple thing for the beggining.
Please do not use minergate, they give terrible hashrate because they steal them. Best is to search for miners such as Claymore's miner which are trusted by the community and give out decent hashrates.