It’s polite to mention your team before you mention yourself, so it should be “my team and I” if it’s the subject, or “my team and me” if it’s the object. The usage of “I” versus “me” is the same as if there were no mention of your team.
For example:
<em>My team and I are ready to start.</em>
<em>You are welcome to join my team and me.</em>