Surprised I can grow things in the frigid cold of a Calgary,Alberta Canada
Nice germination. What is your indoor temp there now? Lettuce generally likes somewhat cooler conditions.
21 Celsius when I’m at home and awake. But that’s only from 6am to 7am and 5pm to 9pm. The rest of the day I have the heat down and let it drop to around ~17-18.
That is perfect for lettuces. You are very lucky to have this temperature range for salad greens .