The idiomatic expression "to become a part of one's team" means to join or integrate into someone else's group, organization, or social circle. Full definition
We are also always in need of caring individuals and families who are interested in becoming part of our team of foster families. (animaladvocatesma.org)
Today's interview served to reinforce my interest in becoming part of your team. (thebalance.com)
You can make a difference by becoming part of our team today! (homelesspets.com)