Probably you're well advised if you start small and learn the fundamentals. When you're more comfortable with the numbers, you can also take a look at mining-as-a-service providers like Sazmining. They have farms in Paraguay, Norway and Ethiopia and their business model is such that they only charge their clients if the machines are running. Of course you have risks involved as well but they're a solid company. https://store.sazmining.com/purchase?ref=lkmlHoPitZ5m