It is a huge transition coming from med surg from NICU, but it can be done and what you're feeling is normal.
What will you do the first time you send a baby to the OR or do an admission? You will get help from your colleagues and charge nurse. They are not going to hit you with that kind of stuff right when you come off orientation (we can hope). So next time you see a baby booked for OR, ask the nurse who has them what the steps are. Admissions to NICU are pretty frequent occurrences so take every opportunity you have to help with them. After you've helped with these activities, take the time to make yourself up little checklists. That way next time you get an admission you just whip out your checklist.
Time management is very different in NICU compared to med surg so be open to completely changing the way you manage your time. On a med surg floor, you would be doing a round a vitals, a round of meds,ect. In NICU you want to cluster as many things as you can. Each time you are about to go into the bedspot think of all the things you can get done in that interaction. For example if you've got an antibiotic due at 1000, in addition to giving that med you should be thinking about the following things that can also be done: checking your lines and rates, charting your vitals, checking IV site (this is a given since your about to give an IV med), do your pressure release of the CPAP mask/prongs (if this is something you do on your unit), if the baby has been unsettled take this time to get in there and reposition them/offer pacifier.
When you have your feeds/cares/assessment due, I recommend always starting them early especially when you are new because if you don't your feeds start to fall behind and that will just make you stressed.
A well stocked bedside goes along way, try to make this part of your morning routine as it will save you a lot of time later so you're not running off to the storeroom all day. Same goes for cares, make sure you have everything ready before you go in that incubator (ie. diaper, wipes, thermometer, feed, ect.)
Going back to what I said about having a morning routine, I'll expand on this a bit. Unless I am handed over a very sick baby who needs immediate attention I like to start off with the following:
-fill out whatever brain sheet I'm using, often just a divided piece of paper these days (I do this mostly during report but will add in anything else after report)
-read most recent MD/nurse note ( I realise when your new you might not always have time for this but it is helpful especially for rounds)
-check my orders, check my med doses on the formulary/ check any unfamiliar meds
-check most recent labs, plan any labs that I may have to do this shift
-safety checks (including checking when my lines are due)
-check fridge to see if I have enough defrosted milk to get me through my shift and see if/when I should pull out milk for the next shift
-stock and clean my bedside (if I have time, might have to leave this cleaning till later depending on the day)
Quick note about bloodwork- ask yourself and the provider how urgent this lab is, if what they are ordering is routine you shouldn't be disturbing a settled baby to take it, try to cluster bloodwork with your cares
Brain/Day Planner- all new NICU nurses should definitely be using one whether your unit provides something or you find one/create one. If you search all nurses there is a good NICU brain that was posted way back
Lastly, the amount of information to learn in NICU can be overwhelming but you don't have to learn it all at once. Take responsibility for your own learning, get a neonatal textbook, print off your units policies and read them at home.
I know this is a lot of info but I hope it is helpful, hang in there!!