I don't know how long you've been out from the tour of duty and how long you've work before. That will have a big difference in transitioning back.
One thing for sure is that if you made it from school to becoming full fledge and manage to work...there is no doubt that you'll do fine, unless of course you have some other personal issues or challenges in schedules.
Nursing shortage is getting worst each day without any immediate solutions so far (or I should say willing participants to unite for a common resolution, because I believed there is a solution to this crisis).
Though things have changed in the past 5 years, all of these changes had it's roots from the past...so you won't be struggling in the dark.
Also, there's a lot of handy resources like this online community where you can obtain tons of information.
So good luck, stay confident and don't forget you are a force to reckon with, you have a big role to play, the health care industry needs you now more than ever.
Welcome back to the workforce.