Mining is easy, but the higher difficult Ethereum right now is the hard way. Cost operational electricity more than the profit you get, except the Ethereum price going up
For the beginner, mining Not easy but very difficult. First, the beginner should read a lot, then practice what the read.From knowledge The GPUs, Motherboards, and configure RIG when it configures sometimes has a problem and must reading and practice to solve a problem. Also, knowledge about which the coin(profitable) to be mining. Except using Nicehash, and even to do benchmark first. When the Benchmarking sometimes fail.