Merely having inclinations does not disqualify one for any aspect of Church participation or membership, except possibly marriage. But even that, in the fullness of life as we understand it through the doctrines of the restored gospel, eventually can become possible.
In this life, such things as service in the Church, including missionary service, all of this is available to anyone who is true to covenants and commandments.
Any opportunity to serve in the Church is a blessing.
