Book/prayer recommendations?

My husband will be deploying sometime next year for 6 months. I want to write him a journal (a page a day) for him to read. I’d love to fill it with prayers, little devotionals, encouragements, etc. I’m having a hard time starting because we are both baby Christians… and I just don’t know how to really pray for him. I know it doesn’t have to be fancy but I feel like I pray simple things like “I pray you’re safe. I pray you feel blah blah blah.” I want to articulate things better so I’m hoping to find a book of a devotional or prayer for husband as a guide for myself to write specific prayers for my husband. Any recommendations?

Additionally, any ideas of what else to include in this journal?