They all promise that, and they all break their promise. Starting with Twine. 😉 If you made anything with it that involves more than simple links, you've been coding, even if you don't realize it right now. So just learn to code.
That said, Ren'Py is a way to grow into making more advanced games while working in a way not too different from Twine. Look into it first.
It's been too long since I've been a beginner, and things have changed. Maybe the official Python tutorial, or the Invent With Python books? But since you're using Twine already, learn the more advanced features of your preferred story format, like loops, conditionals, variables, arrays... that alone is going to teach you a lot. SugarCube markup in particular is as powerful as any programming language, but I think Harlowe isn't far behind.
