Domisto
One of the side effects of Unity being super popular, free, and easy to use is that there is a ton of resources available online.
Personally, I'd suggest doing the Roll-a-ball tutorial to get familiar with the editor, and then working through
the official Unity scripting tutorials one by one which will give you a crash course in the C# fundamentals, and from there if you get stuck looking for specifics about what you're trying to do.
It might also be helpful to see what other games do, and how they do it - Ludum Dare compo entries for example, its mandatory to provide source code, so any game made in Unity thats a compo entry will have source that you can look at and use yourself to see how things were done (but the odds of game jam source code being optimised, clean and commented are pretty low, heh).
There's also a bunch of youtube tutorials that are along the lines of 'build a game step by step', which you might prefer as you'll have a tangible game to play at the end of the tutorial, but copying what someone else is doing without knowing why they're doing things might not teach you anything that sticks, ymmv.
Sebastien Lague (especially his gamedev maths, procgen and blender rigging tuts I found particularly useful) and
Brackeys are both Youtubers I've watched stuff from, and I guess are 'good enough' because they've both been hired by Unity themselves in an official capacity at some point
Also of course you can post stuff here or ask questions here, there used to be a lot more of that when this topic was busier :/