First of all, congratulations on the position!!! That, in itself, is an accomplishment in this RNs-only/BSN-preferred climate.
As a former med/surg LPN-turned-RN, I suggest that you keep your eyes and ears open to learning all that you can. If you ask a question, write down the answer. (Buy a notebook and carry it with you at all times. Make sure it has those colorful plastic dividers....they last longer especially when you repeatedly access your information). The notebook not only protects the patients' information, it houses your make-it-or-break-it future in your very first nursing job. Writing down the answers to situations, techniques, door codes, phone numbers, location of supplies, 'check for this lab before giving that antibiotic or medication', etc., keeps you from having to ask your preceptor to repeat him/herself. Of course, when in doubt, don't hesitate ask!
That list of phone numbers and extensions that you see taped at the nurse's desk, make a copy of it to go inside your notebook. If there are still physical charts and handwritten orders at your location, copy the orders and take them with you instead of trying to remember what an order said.
There is a lot to learn and you won't get it all in your orientation period, nor will you get it all in your role as a med/surg nurse. But you have to start building that database somewhere, right? Even if your preceptor and you have blood to hang and your scope of practice doesn't allow you to do it, write down the entire process while you are watching. Policies vary by facility and state. If you're at a facility where the RN only has to spike the bag after the initial verification, you will need to know what to do. (Your role in that should be covered in your classroom orientation).
As long as I've been in nursing, I still write down everything. There is just too much info embedded in a 12-hour shift for you to try to remember, especially when patients and families and doctors and co-workers all summon you at one time. I could go on and on and on here, but like I said, there is just too much to know and it won't all be covered at once. But I think this is enough to get you started. You will feel overwhelmed but don't let that discourage you because that is a normal feeling with new grads, as well as seasoned nurses starting a new job. When you get your assignment and you have six patients, remember that is a good thing because you could have been that nurse with five patients and an admission right off the bat.
One last thing, very important!! When you go in to say hello to your patients and they start hurdling all these questions at you, don't panic or fumble. That's what the notebook is for. Don't even attempt to answer those questions unless you do have the answer that they are looking for. Explain to them that since you are just coming on, you are WRITING DOWN their questions and plan to go find the answers as soon as you step in to say hello to 'a couple more patients'. I've found that this approach is readily acceptable IF you indeed make an effort to find the answer by the time you return to their room.
Good luck and congrats again on the new job!!