Newbie Struggles with Dom Perfectionism

So I started this DDLG thing a couple months back. It's like, one of those things where you're all "I know exactly how I want to do this!" and then reality kicks in and it turns out you're completely clueless. Me being me, I had this vision that my dom was going to be some perfect, god-like figure who just knew everything about me. But of course, that's not really how it works, is it? It doesn't help that I'm still figuring myself out too, let alone trying to figure out what the hell my partner wants. I mean, she's great. She's actually pretty chill with all this stuff and tries her best to guide me through it. But there are times when I feel like a complete failure because nothing matches up to how I imagined things would be. We've tried a few scenes, but they never really live up to what I had in my head. I keep second-guessing myself. Am I just not good enough? Is this whole thing a mistake for me? Then there are days when I feel like maybe she's disappointed with how things are going. But that can't be right, because we talk about it and it's all supposed to be okay. So here I am, 24 years old, trying to figure out if this whole DDLG thing is just too much for me or if I'm actually onto something and need to stick with it. It feels like a constant loop of trial and error, but also trying not to mess things up because... well, that's what you're supposed to do in these dynamics, right? Be perfect. Anyway, this is just me venting, nothing more. I know there are other people out there who struggle with this too, even if they don't talk about it. It's kind of liberating to admit it and maybe that makes things a little easier.