armbian-config is not available in minimal installations, but you can install it via apt if you need it's configuration capabilities. It allows you to install software, desktop interface, configure timezones and locales, install Armbian to internal flash and lot's of other things. See the armbian documentation if you want further details.
You can do whatever you want with your box, you have a fully working debian linux box now.
Khoa Nguyen reacted to jock in CSC Armbian for RK322x TV box boards