The source adds that, after recuperating from her injuries -- and with her husband, Mike Fisher, returning to hockey after a brief retirement -- Underwood "thinks this is the best time to go for what she really wants."
"She strives for perfection," the source notes.
The 35-year-old GRAMMY winner and mother of one was rushed to the hospital on Nov. 10, after she badly injured herself while walking outside her house in Nashville, Tennessee.
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Carrie Underwood Not Letting 'Freak Accident' Slow Her Down
Underwood broke her wrist, which required surgery and a titanium implant to fix the fracture. The singer also had to get 40 to 50 stitches in her face.
In January, after having not shown her face in photos for months, Underwood told her fans, "I am determined to make 2018 amazing and I want to share things with you along the way. And when I am ready to get in front of a camera, I want you all to understand why I might look a bit different."
The source tells ET, "Carrie hid her face because she did need to heal," and added that her appearance post-accident won’t be dramatically different.
Earlier this month, Underwood posted the first photo of her full face to Instagram since the accident, although the photo was taken from relatively far away as she rehearsed with her bandmates.
On Tuesday, Underwood gave fans a health update in an open letter, writing, "Physically, I’m doing pretty darn good these days! My wrist is almost back to normal, about 90% there… and my face has been healing pretty nicely as well. I definitely feel more like myself than I have in a while."