To be clear on this, you're walking north to Irving Park, then taking the Irving Park bus (80 or X80) to the Irving Park Blue Line stop. You're not walking to the blue line stop, which is about 4 miles west on Irving Park.
Here's a map of what you're doing for some scale. From the start to the pause, you're walking north on clark. From the pause to the blue line stop (at the Kennedy), you're on the 80 or X80 bus.
Google Map