Try doing the daily bounties, they occasionally drop engrams, strange coin, Mote of lights, materials, etc. If you find your gear is lacking to proceed with the story, you will have to do what we all had done in the beginning, Go on Patrol and grind the shit out of it until you have engrams and gear to swap out. Using green and blues should not matter as long as they have a higher attack and defence value. Wait until you are level 40 before you are picky.