Advent is a wonderful time of year, and there are many resources you can use to enhance the time. We are in the thick of the season already, but there are many Kindle books or other resources that you can tap into quickly via the internet. Here are some that I think you would find encouraging and, overall, helpful:
Music
Still and A Midwinter’s Eve by Nathan Clark George
Behold the Lamb of God by Andrew Peterson
Prepare Him Room by Sovereign Grace Ministries
An Irish Christmas Festival by Keith and Kristyn Getty
Handel’s Messiah by George Frederic Handel
My Sentimental Favorites: Joy, Joy by David Phelps, The Gift Goes On by Sandi Patty, When My Heart Finds Christmas by Harry Connick, Jr. (Yes, I expect to be harassed for this!)
Articles/Books
Dawn of Redeeming Grace: Daily Devotions for Advent by Sinclair Ferguson (Kindle Book)
God Rest Ye Merry: Why Christmas is the Foundation for Everything by Doug Wilson (Kindle Book)
The Advent of Glory: 24 Devotions for Christmas by RC Sproul (Kindle Book)
10 Reasons to Celebrate the Church Calendar by Uri Brito (Online Article)
The Theology of Christmas Hymns from Tabletalk Magazine
I hope these are helpful to you! Let me know if you have found other resources to be helpful this time of year.