Christ's time alone with the Father was in preparation for more ministry. It was sustaining. But not to proceed in selfish endeavors. Prayer, ultimately, calls us outside ourselves. 

The first Adam's garden was peaceful. The second Adam inherits a wilderness full of danger.

That Christ subjects Himself to John's baptism is not confusing. It is comforting. It is not perplexing. It it the being of God's perfecting of His Saints.