is it worth to play?

It starts weird, you know nothing, it's super intimidating to play.

As time goes on you learn the vast majority of champions and abilitys.

At this point, it starts to be 'fun', and eventually as you learn more and more it starts to become unfun - Because you start knowing things your teammates don't, and since they don't know those things they don't make the plays you expect, which causes frustration.

If you play exclusively as 5 I could see the game being pretty fun though.