When it comes to buying Ethereum (ETH), there's one exchange that's safer and faster than the rest: Coinbase.
Just create an account, upload proof of identification (it's to keep your account secure), add a debit card to handle the payment or transfer some funds from your bank account, then enter the amount of Ethereum you want to purchase — and that's all there is to it.
Related: How To Mine Ethereum
You don't necessarily need to buy Ethereum to start stacking up a balance. Rather, you can Mine it. All you need to start off is an Ethereum Miner (also known as an Ethereum Mining Rig) like the Coinmine One. Simply hook it up and tell it to start Mining. Simple.
Mining Is The Cheapest Way To Acquire Ethereum
Right now, Ethereum has a token value of $215. If you were to Mine an entire token using a standard Ethereum Mining Rig (not a Coinmine, which uses a lot less power), you'd be forking out around $152 to cover the cost of the electricity required to do so.
In a nutshell, Mining is the way to go.