New Job!

Just a few questions. I was just made the QA nurse at our facility. This is a completly new job, there is no job description. Basically I'm making up my own job as I go. The DON and I have discussed what this would include, but this was part time. Just last week I was asked if I could make this a full time position. Now I'm just wondering what other directions to take this, since I will be more than doubling my hours. So far I have been reviewing chart order, assigning monthly summaries and making sure they are completed and correct, care plans for all residents, tracking antibiotics for acute infections, temporary discharges, glucometer and refrigerator controls, and auditing MAR's and TAR's. Any suggestions would be great. What other things do you get involved in? And I'm also wondering if I should count on having to do overtime and be there at all hours. This will be my first full time position after having my babies and I don't want them to think they've lost their mother. Thanks so much!