@zleap you can still learn and make very cheaply for example using the #RP2040, #RP2350 or the #ESP32.
The disappointing thing is RPi was, to a point still is well documented and supported ecosystem specifically designed for learning. That focus has changed, hence the (slight in some cases aside from RAM prices) price increases.
Focusing on microcontrollers is cheaper , more to learn and absolutely fundamental to understanding s/w & h/w.
RP240 < https://en.wikipedia.org/wiki/RP2040>
RP2350 < https://en.wikipedia.org/wiki/RP2350>
ESP32 < https://en.wikipedia.org/wiki/ESP32>