Oh the first time I ever tried to use CS, I felt super overwhelmed and that feeling made me feel dumb. It sucked 
But I’d done way harder stuff in less time. You have too. It might not seem that way now but give it a little while and you’ll see. The thing that worked for me was honestly just making a bunch of stuff. I made a ton of little unfinished projects for every single idea I had not because I wanted to finish a project but because I wanted to get familiar with the language. I have (well, had) a bunch of them, like twenty-thirty, I think? And they weren’t things I was focusing on being a 600K HG, they were just “I want to get comfortable with, idk, string vars or temps or multireplace so I’m gonna focus on that and use this as an opportunity to get the ideas in my head out of my head.” The hardest part was taking time to focus not on the writing but on the coding.
And I still don’t know a bunch of stuff. I’m currently trying to get comfy with arrays, which I only kind of understand even though I… kind of understand them. That makes sense in my head. And there’s a whole other library of functions that I haven’t even explored yet because it’s kind of intimidating lol And I know I’m not the only person here who would describe their CS competency as less than 100% (in my case, way less lol) but as long as you can make your game do what you want, you’re doing great. You don’t have to absorb everything and know it all the time. That nifty wiki is there, might as well use it, and as you do more and more, you’ll remember and get more comfortable with it. You can do it! Summon your inner anime protagonist and fake that confidence! 