Excellent! Congratulations and respect, Steve. You did just great.
And you don't look tired at all. I am certain that you could run some more :)
As for your next goals. Take it easy and make the distances up to a half marathon your comfort zone. Then it will be time to step out of this zone and to the next big goal. It just might be a marathon run, why not.
Bravo!
I felt pretty good at the end, but then I did put in all that training. My legs are still sore, but I'm looking to do more 5k and 10k events soon. I'm not sure I'd want to do the longer distance too often, but maybe I can get out to do them gently now and again.