Then Jesus, you will need an appropriate leader, one that is reputable, punctual and hardworking.
Reputable as in most if not all members in the team respects him and will follow his order. I had been in teams with such a leader and boy, let me tell you it is shits for all participating person in the team. The leader is screeching as he tries to push forward his idea, the slackers are shrieking and the opposing parties are not compromising because of the leader. Either way, the entire project got scrapped.
Punctual is self explanatory, but the leader has a secondary problem of ensuring the other people in the team to be punctual as well.
Before you say "but we don't need a leader", you do. You need someone to be the head, a referee, a timekeeper.
Then as someone who is NOT the leader in the team, you still need to contribute ideas, work hard to further the agenda of the team and etc etc.
Working in groups require people skill, you can tag yourself as an introvert but you must still know how to communicate with others. If not then you are the silent asshole/ mindless grunt in the team.