I-90, heading EAST:
Take exit 7B, turn RIGHT onto Ramp towards Island Crest Way
Turn RIGHT (West) onto SE 30th St
Turn LEFT (South) onto 78th Ave SE
 

I-90 heading WEST:
Take exit 7, turn RIGHT onto Ramp towards Island Crest Way
Turn LEFT (West) onto Island Crest Way
Turn RIGHT (West) onto SE 28th St
Turn LEFT (South) onto 78th Ave SE
 

MAP:

PARKING:
Parking is available in the church parking lot, along SE 32nd Street, and along 80th Ave SE
the yellow zone in the parking lot is for the clinic, but can be used on Sundays as parking through a mutual arrangement with the clinic.

This is the View heading South, which is the direction you'll be heading, coming from the highway.
There is extra parking is available along 80th Ave SE, which is behind the church, along SE 32nd St, and of course in the parking lot adjacent to the church, which opens to 78th Ave SE.