Getting to interviews without a car in Portland - any advice?

I do not have a car and interviews in Portland are spread around. I have read a lot of threads here and could not find my exact situation. I do not want to be late. Any rideshare programmes?

Our transit agency has a reduced-fare pass for people with low income. The application took a week.

Keep everything in writing and save the confirmation numbers. It made the follow-up calls so much easier.