The Local New Testament Church!

... understand, YOU ARE THE CHURCH; Christ is building
His church with YOU; YOU are the habitation of God!
The Lord Jesus Christ is the Owner and Builder of His Church:
He builds His Church with living stones, living souls: Sinners born-again by the power of the Spirit of God.

If you're a "Born-Again Christian", you should be very dedicated to the a Local NT Church; the one primary reason, because you are part of the universal church and body of Christ.
Outside of your own personal family, your local NT church should be the most important group of people to you; the church is your spiritual family; brothers and sisters in Christ who are united to Christ by faith!