I don't see how the verse from Joshua applies. We can't just choose to become Christians today. Nobody can be saved unless they hear the gospel and the Holy Spirit draws them.

I also don't see how Satan can silence your worship. Does he take away your voice? It's more likely that Satan puts evil thoughts into your head. Or unpleasant memories come back about other people and you're reminded of those times you were hurt by them.

The Holy Spirit will fill you as engage in spiritual disciplines. Those are prayer, church attendance, and Bible reading. As well as growing in obedience. You can listen to Bible podcasts and those will feed you as well. My favorite is "Thru the Bible". You can download the entire 5 year program for free at ttb.org.