Hey there, brii.
Honestly, I think that for right now, focusing on where the external portions of your clitoris are and trying to find them (and we can help with that finding more if you want) might be besides the point, from the sounds of things.
What sounds most likely to me is that what you're experiencing is probably mostly about 3 interrelated things:
• What you probably think you should be doing to masturbate, or how you do, hasn't met your expectations or wants in terms of what they feel like, and how they make you feel
• You have gotten a bit sour on it in your head, and are expecting disappointment or that "nothing" feeling
• You haven't yet been explored this enough with both a positive attitude and an open mind about what you feel and while trying some things or approaches you haven't yet.
Let me explain this a bit more, but without going on for ages.
I don't know what things you have been doing with masturbation as far as your actions, or imagination, or setting: what parts of your body you have been touching (not just what parts of your genitals, of your whole body), what kind of environment you're in when you do try and masturbate (like, do you like it in there? do you have the feelings of safety and privacy you need to really get into things for a while?), what tools or other things, like lube or toys, you're using, what you're thinking about, etc. But very often, people get the idea that masturbation is only about genitals and genital pleasure. A lot of people also don't think about *where* they are masturbating, especially when just learning, and how much their environment can influence all of this. Same goes for how many people often think that how we all masturbate looks the same way, has us engaging the same parts, and doing the same things with them. A lot of people don't realize how much our attitude -- I hate that word, it sounds so parental, but it is what it is -- influences our sexual experiences, and that it is super easy to psych ourselves out of pleasure.
What do you think about all of this? Is there any part of it that feels like it might be a missing piece, like not thinking about privacy, or not realizing this doesn't have to be centered on genitals at all?
We can also talk about your expectations, if you want to do that, too. Usually, when someone comes here and says they "feel nothing" genitally, they don't actually feel nothing. Like, if they touch themselves, they can feel it, it's not numb. What y'all who say that usually mean is that it does not feel AT ALL like you expected it to feel, and a big part of that unmet expectation is that it simply feels like way "less" than you thought it would. And there's some stuff around that that can help for folks not feeling satisfied like this.
You also might want to have a read of this piece, if you haven't already: Going Solo: The Basics of Masturbation