Nimble escape: you can take the Disengage or Hide action as a bonus action on each of your turns.
Goblins have limited Background options – check with the DM.
MM 165, plus:
Shall Not Be Named: Maglubiyet has literally been excised from the official histories and from goblin culture, or so everyone assumes. The story is simply that the rose from darkness and barbarism into the light of civilization, taking on the worship of true gods like Moradin and Pelor.
Star Students: the goblins are held out as the shining success of the Rehabilitation programs. They were some of the first humanoids to be rehabilitated, and for the most part only goblins have had more than a generation or two outside the Camps. Though they still experience plenty of discrimination, goblins remain model citizens, and some have even risen to positions of minor responsibility in the Last Empire.