I am new to ASP.NET, i am having trouble on DOTNET.

I have been trying to correctly configure data access with oracle DB. Things i have been trying to understand are.
* There are two nuget packages for oracle Oracle.ManagedDataAccess and Oracle.ManagedDataAccess.EntityFramework, should i use both or there is a condition for using/choosing one?
* Installing nuget packages is enough for development or should i also download and install ODAC * I cant find proper/easy to understand Web.config configuration guides.

From what i gathered i can create data access layer and configure dbContext which will refer my Web.Config and it's easier then on. Theoretically i really liked that but i can't seem to get around the configuration.