What ever position you take as a new RN will be stressful - forging craft between your learned skills and the application in the work place can be stressful ... but this will pass and you will attain confidence with time and experience - you really will, honest!
I'm sure your employer knows you are a new nurse and usually they want you to succeed as much as do you. Ask them what systems your predecessors successfully used - perhaps you will not need to recreate the wheel
As a case manager in home health I found tickler files very helpful. Whether you set them up in actual paper files or as one set up in your computer a tickler file set up for each time sensitive task; re-auths, re-assessments, supervisory visits, etc.... and make a habit of checking the files the end of each evening and week to organize and schedule your activities, or assignments for your staff, for the next day and week.
One way to make the tickler file is to just make a copy of the face/intake sheet and/or the order/authorization sheet and place it in a file system set up by day, week, month, depending on the intervals applicable to the situation - when the task is assigned or completed re-file the client data sheet back into the tickler system to where it will next be due...
be creative - you have the skills to make it work for you, your clients and your employer! You'll likely get several suggestions from here and at work and from other people you know... take the best, try a few and create what works in your situation
You GO girl!!