The 'Wolves' hitmaker entered a treatment facility at the beginning of October after suffering an "emotional breakdown" due to issues related to Lupus and her kidney transplant.
But according to an insider, Selena is now feeling much more positive and is determined to make the most of her opportunities in 2019.
An insider explained: "She's feeling like this is a fresh start and she has new skills to help her navigate daily life. She's doing well and is feeling great. She's following a simple daily routine that involves a work out, either hiking, Pilates or hot yoga, therapy sessions and spending time with friends."
The brunette beauty has reportedly started "going to church", and is "working with several professionals" who are helping her put together a routine so she can stay healthy.
The source added: "[She is] going to church and surrounding herself with the right people. She is working with several professionals that are helping her focus on being positive and staying healthy.
"She is spending time with them daily and has a strong support system in place."
-Bang! Showbiz