Have a look at https://docs.toit.io/tutorials https://docs.toit.io/tutorials (using Toit). I wrote lots of easy to follow tutorials there. It depends a lot on

Have a look at https://docs.toit.io/tutorials https://docs.toit.io/tutorials (using Toit). I wrote lots of easy to follow tutorials there. It depends a lot on the sensors you have. That said, even without any (or few) sensor(s) you can still have fun with network related applications like a Telegram bot.