Arduino Introduction | Proteus Introduction | Design of an Arduino based circuit on Proteus - YouTube
ARDUINO UNO WiFi REV2 — Arduino Official Store
Circuit design software that makes it easy to design, document, and debug electronics projects for the breadboard (more info in the comments). Would you find this useful? (x-post with r/ArduinoProjects) : r/arduino
ARDUINO UNO SMD Reference Design in DesignSpark PCB format