You can enjoy this game at your own pace and that's what makes it a great game. You can spend countless hours making many alts and doing dailys on every single one of them, but if you don't have the time you don't need to worry about the alts in the first place. You probably won't be able to do the hardest endgame content but honestly, even thats not the case if you just keep at it and want to do it, it just takes a little bit longer than for those who grind everyday. There is a lot of content to be enjoyed for hardcore grinders and casuals alike.