If you'd like to learn more about the Earth's orbit and perihelion, check out these resources:
What Causes the Seasons? | NASA Space Place – NASA Science for Kids
“We’re closest to the sun in early January. Seasons come from Earth’s tilt, not the distance. That’s why it’s cold outside when we’re closest—the Northern Hemisphere is tilted away from the sun’s direct rays.”
This is the most useful takeaway: