No one knows what to do. They just do it. This is not to say that everyone is walking around in the dark. But everybody is doing ministry in a different situation; culturally, demographically, size, maturity etc.
Jesus knows what to do, therefore go talk to Him about it, read the bible and work out what ministry will look like in faithful obedience to Jesus.
Also don’t be afraid to ask people for help, learn as much as you can from others, but as a warning, this advice does not always work. Importing a program, copying a curriculum, following the 13 steps to a growing church guide may work, but is designed for a different place. Asses these with wisdom but consider your own situation. and figure it out.
Try new things, test different approaches, be willing to take risks and make mistakes. Learn from these and share these findings with others. Make content free and available for others to gain knowledge and wisdom from too.
For myself, it is often too easy to just do whatever everybody else is doing, it seems that it works for them so it will work for me too. In the end this is laziness and unfaithfulness to the people God has entrusted me with. I need to spend that time with Jesus working it out in prayer and meditation on His word.