Arena Strategy games are good fun, had loads of fun with LoL with friends, if you have someone to play with it makes it worthwhile, can be difficult getting into the game solo. 4 Random team mates you don't know that may/may not rage at your skill, it's the one downfall of arena strategy, the team is dependent on everyone's performance.
That being said, there is a lot of character guides and strategy guides. You can find something for every aspect of the game to increase your skills, whether you want casual play or advanced play.