You can look for the following and maybe more:
https://nextcolony.io/faq answers basic questions
https://steemit.com/@jarunik he makes these nice graphical overview of core functions
https://nextcolony.fandom.com/wiki/NextColony_Wiki the Wiki is a addition to the FAQ

and sure Discord Channel to talk about all questions

Bounty is ongoing for new explain-Videos

hope that helps a bit