Simple tutorial for bare metal programming

Hello everyone, recently I got De0-Nano-Soc board with Cyclone V. I have some(not much) experience with NIOS2 programming, but it was fairly simple to work with nios. I don't quite understand how to flash my SoC, how to get header files with addresses. So I need some easy tutorial for dummies with using Quartus, Qsys, DS-5 and flashing with bare metal example. Simple blinky would be enough I think.

What have I already found(shame on me, I do not know forum policy about links):

https://rocketboards.org/foswiki/view/documentation/ws1introtoalterasocdevices

But in this Labs they are using some SDcard images, and I don't understand why.

https://www.youtube.com/watch?v=8behnpg8ivm

In this video programming in DS-5 not shown at all.