So I've been working as an TN for two years now; just starting to feel like I know a little bit to be able to be a good nurse. I've been in Med/Surg/Oncology/Tele for over a year and a half. I'm discovering that I am enjoying the challenges of the more complex illnesses and disease processes, I think I would love to be able to spend my shift caring for a couple very acute patients as opposed to 5 patients on a regular floor; you just do t get enough time with each patient! i think I'll be ready to apply internally at my work this next year, but I'm afraid I've forgotten a lot of that critical care nursing from school, I worry I don't have enough knowledge to be effective. please if anyone can direct me to any type of educational resources that I can use to help prepare myself, and is there any certifications I can get online that might help me as well.?