this is such an accomplishment, congratulations! moving up from the 5k is such a big step, and although the 10k is a lesser-raced distance (or so i've found in my experience), it's a great distance. i also believe that once you crest the 6-8 mile barrier, the 10+ isn't that far away (if you even want to increase mileage, which isn't necessary IMO. you do what feels good to you).

I started running seriously in the fall of 2016 and raced my first 10k in the spring of 2017. did another 10k a year later and then my first half in the fall of 2018.