Got the first pico pies in. Soldered pins and started to look how to program them.
Folowed the steps on the raspberrypi.org site and got this far.
So right now the pi and computer (pi400) are talking to eachother using thonny.
And pin 15 is working as output.
I know this is pyton and not c++ so the next steps will be getting the arduino ide talking to the pico.
Btw my programming skills are beginner or worse....
pico pi blink led