What is Stellar?
Stellar, or Stellar Lumens, is an open sourced, distributed payments infrastructure. Their idea is to connect individuals, institutions, and payment systems through its multi-currency platform. A simple way to think about it would be a replacement and improvement upon PayPal. Stellar is also a like Ripple and presents competition in that space, however, Ripple is very much designed for institutions a banks, Stellar is designed for the average guy.
How Can You Buy Stellar?
Stellar has not yet been widely accepted enough to be listed on any of the major exchanges like Coinbase. You can still purchase Stellar as an Altcoin though via the other avenues listed below. Use your major cryptocurrencies to get Stellar.
Since this is a trading education website I must assume that you are also interested in trading. Cryptocurrencies can be traded for cryptocurrencies or back into fiat currency via cryptocurrency exchanges. This is a style of trading with no leverage which makes it very easy to understand. You can trade with or without charts and therefore decide your own level of complexity. Most amateur traders diving into cryptocurrency are just looking to buy and hold certain cryptocurrencies because they believe in them. With or without charts, less or more involved, the options are both there.