Here are some points to help you get started. Live a consistent life before the eyes of all people. A lifestyle must be followed by words to explain it, but a witness must be preceded by a life to support it. Others will trust a Christian even before trusting Christ. Pray, pray and pray.
Evangelism is the spoils of prayer.
Paul prayed for protection, open doors, boldness, clarity, and responsiveness. Direct the conversation. I find it is much easier to talk about Jesus after I have moved the conversation to spiritual matters. Look for an opportunity to share a brief testimony. I will share how I have found assurance and hope through Jesus Christ.