I have this exact same problem. I'm not exactly sure why, but finding useful examples has been a serious pain point for me. It seems like there's a serious dearth of material between the "here's the absolute smallest thing you can do" and "now we're going to built the F-35, but with ROS!". Like, I want to subscribe to and manipulate the value in a topic. Fine. But how about two topics in the same program? All of a sudden my code won't compile and the tutorials aren't helpful.
Especially with the release of ROS2 (which, frustratingly, seems to be rarely stand-alone, in that the learning process often references or links to ROS(1) code through things like rosbridge), it's just been a frustrating experience. If someone were to release a paid textbook walk-through that actually explains it in a systematic, stand-alone, way with linked repositories, I'd buy it tomorrow.
Which, I suppose, is sort of exactly where this kit is aimed!
Especially with the release of ROS2 (which, frustratingly, seems to be rarely stand-alone, in that the learning process often references or links to ROS(1) code through things like rosbridge), it's just been a frustrating experience. If someone were to release a paid textbook walk-through that actually explains it in a systematic, stand-alone, way with linked repositories, I'd buy it tomorrow.
Which, I suppose, is sort of exactly where this kit is aimed!