Thanks for your comment @SteveProXNA
To get published on the Steam platform, I went for “Steam-Direct” - a steamworks partnerprogram.
More information here:
https://partner.steamgames.com/steamdirect
After beeing accepted, you need to process a checklist to be able to make your store site public. In the end pretty trivial work to do.
But when you see the steamworks backend the first time, it’s pretty much overhelming. Alot of stuff to learn. This is indeed worth to be blog about or create tutorials to make it easier for newcomers. However it’s not allowed to show the backend sites to non-partners which makes it rather difficult to talk about that.
Fortunately the steamworks documentation is publicity available, which should make things easier, as it also contains help videos made by valve here and there.
Of course i’m always there to help as best as I can if someone has questions I can help with. Not only with the backend, but also with SteamAPI integrations like Facepunch.Steamworks or Steamworks.Net I created repos for.
I find it pretty pleasant and effective to work with repos / wikis / docs and communites instead of creating a blog and would prefere this way of helping furthermore 
Thanks again for your words and have a nice day! 