Walking with the Lord, abiding in the vine – John 15:1-16; abiding in His word (John 15:7; John 8:31-32 – being a disciple; living a holy life, evangelizing where you are.)
Holiness – see Hebrews 12:14 – “without holiness, no one will see the Lord”
If you are not sharing your faith in your culture, what makes you think that will change when you get on a plane and go to another culture and have to learn another language, etc.?
Local church counsel and confirmation and sending out. (Acts 13:1-4)
Raising support. (money & more prayer partners and most likely a team of several churches that are committed to you.)
Accepting God’s sovereignty along the way as you raise support and move forward.
Sharing your vision with other Christians and churches.
Also teaming with others – no one should go alone – the apostle Paul was not alone; he had his team – Barnabas, Timothy, Silas, Luke, Sosthenes, John Mark, others. (and the Bible shows us the reality of missionary team conflicts and changes in the personnel – Paul’s conflict with Barnabas and John Mark – so don’t be surprised.