re: Can someone explain to me buying ethereum/Bitcoin

Coinbase, Gemini, and other cryptocurrency exchanges are options.

Basically you go to their website and follow the instructions to set up an account. You will likely have to verify your identification by sending in a picture of your drivers license or something and it will take them a couple days to approve your account.

Then you will be able to link up a credit card or bank account to their website/exchange to deposit funds. Then you can purchase various coins (BTC, ETH, etc...) and begin trading or holding.