Prayer is not just talking to God or just communicating to God. Prayer is a definite message with words to God based on what the Spirit is praying. See Romans 8:26 where the “Spirit helps” us pray with words.
Our talking may or may not be the Spirit’s words. Communication indicates a two way communication, but when God speaks to us the Bible does not call this prayer, the Bible calls this illumination or revelation.
You may want to view a John Piper short video on this topic.
So in prayer, try to listen to God’s speaking to know how to pray. And yes, this is hard to do.