bobbi kristina brown*The Houston family is concerned about 19-year-old Bobbi Kristina Brown, to PEOPLE.

Since the death of her mother, Whitney Houston, she’s of course been mourning but the press has been anxious to get an interview with the young woman.

Her first interview is scheduled with Oprah Winfrey on Sunday. But the family is begging her to take it slow.

“There is still no resolution and there has been nothing concrete on the cause of [Whitney’s] death, and they were hoping for that,” a Houston family friend told PEOPLE. “There were members of the family who weren’t keen on [the interview] going down at this time.”

Family members are encouraging her to stay out of the limelight for a while to allow time for healing.

“She’s so very young and impressionable,” said the source. “She has to start finding herself as a woman on her own as opposed to defining herself as Whitney’s daughter and Whitney’s support. It’s kind of interesting to see what’s going to happen to her from here on in.”

Bobbi Kristina’s interview, which also features Winfrey’s interviews with Patricia and Gary Houston, airs Sunday, March 11 on OWN’s “Oprah’s Next Chapter.”