Personally, I would forget about Oracle Express and instead download the full version of Oracle Enterprise Edition. On Windows, this is fairly easy to install, and you can use it for development, prototyping, or self-education purposes without having to buy a license.
As others have said, you will also want to download the ODAC / ODP.NET and SQL Developer drivers.
To begin with, you can try out some of the Oracle tutorials by example . They will guide you through the basics (installation, PL / SQL development using SQL Developer).
I would also recommend reading the first few chapters of Tom Keithβs book, an expert at Oracle Database Architecture: programming methods and solutions.
Robt
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