Dived in is a common phrase used to mean enthusiastically starting an activity or project. Some synonyms for dived in include delving into, immersing oneself in, plunging into, and tackling with gusto. Other alternatives for dived in could be getting stuck in, hitting the ground running, throwing oneself into, and taking the bull by the horns. All of these synonyms share the same sense of wholeheartedly committing to something and not holding back. Whether it's starting a new job, pursuing a hobby, or learning a new skill, finding the right synonym for dived in can help you express your enthusiasm and eagerness to get started.