Joshua 24:15
¹⁵ But if you refuse to serve the Lord, then choose today whom you will serve. Would you prefer the gods your ancestors served beyond the Euphrates? Or will it be the gods of the Amorites in whose land you now live? But as for me and my family, we will serve the Lord.”

Take time to consider what you actually believe about who God says he is, what he has done for you, who he has made you to be and what you’re called to do as a result.  Now live that way with all your heart and ask Him to help you do that.

If you don’t know how to serve the Lord, then start by asking him.  Then read his Word.  Then engage with a local church community.