It is not scripturally and physically possible to get married in a church since in scripture the church is not a building but a living organism - the worldwide body of simple Jesus followers.
It is of course possible to get married in a building that religionists erroneously call a "church". The physical building makes no real difference to God.
What counts is what is in our hearts and spirit when encountering the real Jesus and the real, full and true message about him (called the unabridged gospel).
Jesus is anti-religion/ists and pro gospel/faith/spirituality.