New Grad: Multiple Interviews and Possible Offers

Hi I'm a new grad and in the middle of my first job hunt.

Within the past few weeks I was fortunate enough to interview with three SNFs and one RN residency on a surgical unit. So far, the first two SNFs called my references and are doing background checks. The third SNF I interviewed with today offered me a position and plans on calling me tomorrow afternoon for a decision. I interviewed with the RN residency last week and according to the nurse manager I should get a decision before Christmas.

I really want to land the RN resident position it is the main area I am interested in. SNF 1 said they might call me back for a second interview, but I do not know what they will offer me yet (full, part, or on call position). SNF 2 would hire me as an on-call nurse to float between their long-term, rehab, and Alzheimers units. This has potential to turn into a part or full time position if available later on. SNF 3 is willing to offer either a full or part time position in both/either long-term and short stay/rehab units. I am also looking for at least a part time position since on-call is variable based on need and a part or full time position would provide more time and consistency to adjust to the job.

There are many possibilities but I'm just wondering how to politely ask SNF 3 for more time to make a decision. I'm in the wait process with the other places but I do not want to burn any bridges too early on. I just feel that it's a bit awkward to try to explain to a potential employer that is providing an offer that I'm looking at other places indicating that I favor those places more. =/

I guess the saying "When it rains, it pours" is true. Each call for an interview all came around the same time.