Arduino and Raspberry Pi are definitely two of the big learning platforms and communities. Arduino is more skewed towards the Things part and Raspberry Pi to th

Arduino and Raspberry Pi are definitely two of the big learning platforms and communities. Arduino is more skewed towards the Things part and Raspberry Pi to the Internet part. For projects and "Hello world" examples you have Instructables: https://www.instructables.com/ https://www.instructables.com/ Which actually maps pretty well to the two main developers of IoT in my experience, Electronic focused people to Arduino and Sofware focused people to Raspberry Pi.