Does a passive drone radar make sense as a project?

Hello everyone,

I'm sorry if some parts of this post sound a bit naive, but I'm fairly new to the embedded world and I'm trying to get started.

I have a Computer Science background, and I currently work as a software engineer. Lately, I've developed a strong interest in telecommunications. More specifically, I'd like to understand how WiFi works at a deep level and, although I know they're different fields, I'm also fascinated by radar systems.

The thing is, I also really enjoy programming, so I thought it would be a good idea to find a way to combine my passion for software development with these new interests. That's why I've recently started looking into embedded systems.

I came across some incredible projects on YouTube, such as QuadRF and Espargos' Antenna, which are capable of visualizing WiFi signals in real time. Watching those projects made me want to build something similar, even though I know I'll probably never be skilled enough to create something quite that impressive. Still, I'd like to give it a try.

After watching those videos, I came up with an idea that I find really exciting: building a passive drone radar capable of detecting drones by listening to the WiFi traffic they emit.

I know that, as a beginner, I won't be able to build something like that anytime soon. It's simply a long-term goal that I'd like to work towards. For now, I'm planning to learn the fundamentals of telecommunications (I've started reading PySDR, but I'd love to hear if there are better learning resources) while also trying to understand how CSI works on devices like the ESP32.

My question is: does a project like this even make sense? I imagine something similar probably already exists, but is the idea fundamentally feasible, or are there technical reasons why it simply wouldn't work? Should I rethink my approach entirely?

Any advice would be greatly appreciated, and I apologize if anything I said doesn't make much sense.