The game provides you with an enormous amount of freedom, allowing you to explore the world as you like, whether that means carrying out the main mission or doing various secondary missions. Everything is played from a first-person perspective.
You'll also have to fight from this perspective, with all kinds of weapons and spells. The more you fight, the more experience you gain, which will help you improve your combat skills (not to mention a host of other skills).
The Elder Scrolls: Arena is a historic game that, thanks to Bethesda, everyone can now enjoy for free on their computer. The only thing you need to do is install a DOS emulator first.