I published my first nuget package at https://www.nuget.org/packages/NFly.BitsTransfer/1.0.0-alpha1
Although it took me some time to undnerstand how it works, it's an interesting expirence.
To get start publishing your own package, you can refer to these two articles:
- Creating and Publishing a Package
- Multi targeting a single .Net project to build for different framework versions
Hope this article can save you some time.