1) Buy a Raspberry Pi and an Arduino 2) Pick a project: telepresence robot, autonomous robot, sous vide machine, thermal camera trigger, etc. 3) Buy minima

1) Buy a Raspberry Pi and an Arduino 2) Pick a project: telepresence robot, autonomous robot, sous vide machine, thermal camera trigger, etc. 3) Buy minimal pieces for that project: AdaFruit, SparkFun, or various OEM pieces from Amazon, Ali Express, etc. (higher cost = more documentation and fewer lemons) 4) Goto 2)