New Grad RN as Charge Nurse in SNF w/5 days orientation

I definitely need some advice.

I recently got hired at an SNF in SoCal. Considering how difficult it is for a new grad to get hired pretty much anywhere around this location, I do feel very lucky. But am I in over my head?
Here's the DL: I'm a new grad. I will be assigned 30-40 pts. The pts on one side of the SNF are LTC and the other side are "Express Recovery" (aka rehab, post op, etc.). I've been given only 5 days of orientation and tomorrow will be my 4th day. I feel completely lost. I've been following LVNs and an RN (a couple of them charge nurses) around the past few days of orientation, but frankly, they haven't been good on explaining or even showing me a systematic method they follow (although I'm sure they do have one). So all in all, it's been very confusing. I've just been shown (and have done a few) bits and pieces of different tasks I'm suppossed to do. And the roles of LVNs and RNs sort of mesh together, it's hard to see the difference.

It's just so overwhelming, I don't know how I'll be able to handle it once I'm on my own.

Does anyone here have any advice on what to do? On ways to be organized in SNF? What are important points to note? Anything...?