The `Machete` actress is currently undergoing treatment for drug abuse at the Betty Ford Clinic in California and is said to be finding life at the centre lonely but is using the time to try to get her career back on track.
A source said: "At the moment she is finding it tough being in rehab and she misses her friends and family. She only has one hour of internet access per day and she is using this to stay in the loop with her family and friends while trying to do some career stuff too.
"Lindsay has not made any great friends inside the clinic, she is just trying to keep her head down and get on with things."
Lindsay - who voluntarily entered the facility last month - was told by a court last week that she must stay in rehab until January 3 and the troubled actress has been warned by Judge Elden Fox and her lawyer that this is her last chance at avoiding a long jail sentence.
Judge Fox told the troubled actress - who broke the terms of her probation when she failed two drugs tests for cocaine and amphetamines in September - she would face six months in prison if she provided another positive drugs test before her next court appearance.
Her lawyer Shawn Chapman Holley reportedly reiterated the judge`s words to Lindsay because "she wanted her to know the consequences if she messed-up again".
The source added that Lindsay is "taking the counseling seriously though and knows that she is in a place where she is getting help for her problems."