Congrats! First things I got were the splash guards (I see you already have), the folding cargo tray and some cheap-o all weather floor mats. Then I added the S-VCM controller. I've got a list of more add-ons/upgrades I want to do, but next will probably be rear seat covers. 6-y/o riding back there tends to get messy.
Congrats on your new purchase! White with black accents looks super sharp.
Folding Honda cargo tray (Findlay Honda on Ebay was the cheapest I could find)
WeatherTech floorliner mats
Coverking seat covers @ Costco (sadly their sale ended today)
Will shortly be getting clear bra for bumper, fender
Wheel locks (College Honda on Ebay)
Main console display protective film
WeatherTech removeable cup coasters
Let us know what you end up with accessories. Good luck, enjoy your new ride!