Robert, welcome to Pray.Network! I hope you'll find your time here inspirational as well as equipping for your prayer life.
Based on the prayer interests you listed, you might want to check out several groups set up around praying for the country. There's a group called "Cry Out America" started by Phil Miglioratti and one I started called "Praying for the United States". Also, I've done a prayer blog the last couple of years using the "Seek God for the City" prayer guide and I plan to do that again next year - would love to have you join in!
Phil is also the founder of the National Pastors Prayer Network and has a group by that name here. There's also a Pastor's Prayer Group. On the family front, there's Lillian Penner's "Grandparents at Prayer" group.
Again, welcome aboard - may you be blessed through your time on the Network!