We read, "Rising very early before dawn. he left and went off to a deserted place where he prayed."
That gives rise to at least two questions. First, as God himself what did he have to pray about?
Secondly if he was leaving us a lesson, what should we be praying about?
I can think of two answers to that first question. Jesus had to pray out of a longing to be with his Father. Secondly, he was just as human as we are. Maybe more.
The second question: What should we be praying about? There are many possible answers to that. What pops into my head are Paul's words in Romans 14: 7-8.
None of us lives for oneself, and no one dies for oneself. For if we live, we live for the Lord; and if we dies, we die for the Lord. So, whether we lie of die, we are the Lord's.