The game isn't so “pretty”, but it is very useful to understand some concepts like the stack and trigger resolution. There's a tournament system divided by format, and there's all the eternal formats there, Draft and Sealed events, plus a casual area.
It is only available for PC and to purchase an “official account”, there is a fee of 5 dollars. Magic: the Gathering Online (MTGO) was the first virtual platform created to play Magic, with its own currency system and in-game commerce and buy cards as if they were real. In addition, there is also a difference between the available formats. The main difference between the two is the economy and the ways to acquire new cards.
What is the difference between Magic Arena and MTGO?