These 101 tutorials require no previous knowledge of Entity Framework Core or Visual Studio. They will take you step-by-step through creating a simple .NET Core Console Application that queries and saves data from a database. The tutorials can be completed on any platform supported by .NET Core (Windows, OSX, Linux, etc.).
You can find the .NET Core documentation at docs.microsoft.com/dotnet/articles/core.
These tutorials and the accompanying samples have been updated to use EF Core 2.0 (with the exception of the UWP tutorial, that still uses EF Core 1.1). However, in the majority of cases it should be possible to create applications that use previous releases, with minimal modification to the instructions.