When I was a little child, my parents taught me by example to pray. I began with a picture in my mind of Heavenly Father being far away. As I have matured, my experience with prayer has changed. The picture in my mind has become one of a Heavenly Father who is close by, who is bathed in a bright light, and who knows me perfectly.
When you give your heart to inviting people to come unto Christ, your heart will be changed. You will be doing His work for Him. You will find that He keeps His promise to be one with you in your service. You will come to know Him. And in time you will come to be like Him and 'be perfected in him.'
If you reflect often on how His Atonement has changed you, and if you give thanks often, you will find that your witness of Him gains power to touch the hearts of others. When those you invite out of your own testimony feel that witness, they will come to accept Him as their Lord and Savior.