Hello Dr. My Daughter At 38 Years Old Has Just

Hello Dr. My daughter at 38 years old has just being diagnosed with Bipolar disorder type 2, not sure what that is. How can I help her? Is there anything I can do to help her. My daughter is LGTB since she was 18 yeard of age. She has had girlfriends partners with no problem, she is now in a stable relationship with a girl, 15 years younger, she is a fun person at times but depress sometimes (I have not seen that side) but she has told me, she cryes easily when I call her attention on something she is not care, she is a big baby in that respect; my daughter is very smart, never had problems in learning, I actually think she is very sharp with many skills in computers, dispatching for emergencies, graduated as an EMT but had change jobs on going. EMT, dispatching, lending (assistant), etc. The previous job had lots of stress at work and I thought it was the pressure from the load of lots work , so she started to go to the psiclogist and left that job based on "stress", she was out of work for a year, then she start applying for jobs. She now has a good job and exceeds in her performance, but now with this diagnosis she feels "mentally ill", I have to mention that physically even though she has no conditions (No diabetes, Nor high blood pressure nor other condition) but she has had some problems with knees, stomach, she is overweight at 5' 4" she is about 280 pounds.
Is there anything I need to learn about this disorder to help my only daughter? I am very worried not only about her mental stress but her work place since she loves her current job and she is and likes to be financially independent, she owns her own place (mortgage) and bought a new car with credit, student loans, etc. so financially she is okay because she currently has a job, but on medical leave for 3-4 weeks. How should I treat her or should I or not advise her, I know she doesn't like her for me to be "nagging: according to her, but she is my only daughter and I want the best for her. PLEASE HELP!!