Not sure about clay bricks, but it's an amazing cork
MeVoyAlSur
To me, training our ears is part of the learning process. I'm no talking about recognising which note is being played, that's another story, but to perceive when something is off. It's very important when learning to bend the strings. If your guitar is not in tune, your ears don't learn. I tune it every time I start playing, usually once per day, unless notice that something is off. And more frequently when recording.
Notched straightedge, fret rocker tool, action gauge, fret leveling file, fret crowning file... There are plenty of tutorials over there. Adjust the truss rod, level the frets and crown them. Then you can adjust the action as low as you like, without any buzz. These are the basics. Twisted necks are at a different level of complexity, but just having a good action without any buzz is a great achievement.
I have built myself some sensors using Arduino or similar microcontrollers (ESP32, ESP8266) and have them powered via usb with regular phone chargers. It usually requires soldering and writing code, but once you are there, there's no look back. There are ways to simplify the coding part, and HA has good support for them.
Tooth sticks and wood glue. Cheap and works perfectly.