Install EF Core
Entity Framework Core is a free and open source, and it can be installed through NuGet.
When you install Microsoft.EntityFrameworkCore, you will discover that it is the absolute core of EF Core and it doesn't have additional logic that won't apply to all scenarios.
For example, EF Core will need to know what database or datastore you plan on working with and those providers are in individual packages.
To bring EF Core, it is easier to start by targeting the datastore you are going to be working with and let NuGet's dependencies pull in the rest, including the base Entity Framework Core package.
For SQL Server Local DB, which is installed with Visual Studio, we need to install Microsoft.EntityFrameworkCore.SqlServer and will get all the packages required for EF Core.