For modern .NET, you don't need to know anything about the legacy terms of Mono, .NET Core, .NET Framework, .NET Standard, etc. All you need is .NET 8 SDK. It's fully-cross platform and installs support for both C# and F#.
For example, just download .NET 8 SDK on whatever platform, which is usually very easy on most platforms, and then run `dotnet fsi` to get into an F# REPL.
For example, just download .NET 8 SDK on whatever platform, which is usually very easy on most platforms, and then run `dotnet fsi` to get into an F# REPL.