And how much CO2 was produced training the AI that was put on your device?

Depends on where the data centre was that did the processing

If in nordics or france then practically nothing, if in California then depending on the day/time of year, how much wind/solar/battery was going probably minimal

https://electrek.co/2024/12/31/california-grid-100-percent-renewables-no-blackouts-cost-rises/

if somewhere with only coal plants then a decent amount