Congratulations on your decision to bike commute. You know there's a whole thread on a rather exhaustive evaluation of the Denali here on this forum. Check it out if you haven't already. It's quite a favorable review of the bike.

My vote is for some Wald folding baskets to add to your rack, along with a tie-down net for carrying stuff.

Don't forget lights, high-vis vest or jacket and a helmet. I don't want to preach, but you might think about those things.

Best regards.