Hearing the missionary call has a great deal to do with what you are listening for.

God will not lead you where He will not provide for you.

If you are sure that He is calling and you can be sure that He will also remove the barriers that would preclude your service, in His perfect timing. Rest in that.

When you love the Lord, you long to glorify Him and see the nations fall at His feet in worship. When you love your neighbor as yourself, you share the gospel with him and seek to meet his needs in every way you can, which includes seeing him fall at Jesus' feet in thanksgiving for salvation.

God has called every Christian to international missions, but He does not want everyone to go. God calls some to be senders.

What we can say for sure is that, at the very least, God calls every Christian to live with a missionary heart.

When God calls His child to live the life of a missionary, He gives him the desire with the calling.