Try sharing a powerful revelation of Scripture or Christian living that you believe no one knows about. For instance, many of my subscribers liked when I gave them ideas to enhance their prayer life at 3am in the morning on one of my posts I did months ago. Also, briefly sharing a common life situation with a good Bible-based solution is usually what get people's interest. Be patient with yourself because you are still building your unique audience and learning what your subscribers appreciate from you. God bless you!