Similar word to selfstarting:

aggressive, anxious, ardent, aspiring, avid, ball of fire, bent upon, climbing, come on, come on strong, designing, desirous, determined, driving, eager, eager beaver, earnest, energetic, enterprising, enthusiastic, fireball, get up and go, go-getter, goal-oriented, hard ball, high-reaching, hopeful, hungry, industrious, inspired, intent, longing, power-loving, purposeful, pushing, pushy, resourceful, self-starting, sharp, soaring, striving, thirsty, vaulting, zealous