The ATMega328P From (Almost) Nothing: 4. Wiring The Microcontroller
Amazon.com: Microcontroller Development Board with SPI Interface Independent Crystal Oscillator Pin Headers for Arm System USB Development(Motherboard) : Electronics
5-pin JST ESLOV to 4-pin JST SH STEMMA QT / Qwiic Cable [100mm long] : ID 4483 : $1.50 : Adafruit Industries, Unique & fun DIY electronics and kits
PATIKIL Universal IC Test ZIF Socket 24 Pin 2.54mm Pitch for Microcontroller, Chip, Breadboard, Program IC's, 4 Pack: Amazon.com: Industrial & Scientific