Newbie here, need to code program that reads graphic interface and interact with program

Don't. The reason I say that is that trying to learn by doing a project is like trying to learn to drive by starting in pole position in an F1 race! It's vaguely possible you might complete a lap, but more likely that you will stall or crash on the first corner.
Pick a language, get a book (or better a course: a human can rephrase things when you don;t understand, a book can't) and follow it from start to end, doing all the exercises.
That way, everything will be introduced in a logical sequence, and nothing will be missed out. Trying to start learning any modern system by doing a complicated project is a recipe for frustration and missing out huge chunks that could really, really help you.
When you've finished that, you will have a good idea how to get started with your project, and where the pitfalls are.

As for language, I'd suggest that you start with C# - the tools are free (look for Visual Studio Community Edition) and there are a huge number of good books out there: Adison Wesley do loads, as do Wrox. Just avoid anything with multiple exclamation marks, "in xx days", or "for dummies" in the title and you should be fine.