I'm also in my 30s as well. I did insurance and health administration in the past before I decided to become a nurse.
The floor can be chaotic at times, but you just have to try to organize yourself to be on top of things. As you see through the treads, everyone is talking about nursing report sheets (brain sheets) to keeps us organized. With me, I just have to see what sheet works best for me and customize to my liking. Also, ask for help! I used to be scared to ask for help thinking an experience nurse will judge me, however, they prefer that you ask for assistance! They want to make sure you're keeping the patient safe!
First year of nursing is never easy. I have yet met anyone who said they had a great first year. Nursing is a continuing learning process. I still look up information or YouTube videos on nursing materials. It is going to take us time to acquire our nursing skills; whether it be a year or more.