Transitioning from acute rehab RN into another field? (Mom/baby psych etc.)

Hello everyone! I have worked as an RN working at an acute rehab hospital for the past year. I love being a nurse and I love what I do (although sometimes, it can definitely be tiring -- but this is not a surprise!). I love seeing the recovery of my patients (not being able to walk to being able to use stairs!!!; using a PEG to eating foods!), but lately I have been wanting to kind of venture out to other fields. I started this job straight out of nursing school as a new grad. Definitely had my fair share of troubles in the beginning, but I have learned so much! I kind of want to venture into Mom-Baby (my favorite clinical rotation in nursing school). This is my main area of interest. I have thought about psych and urgent care (I turned down a job at urgent care after I was offered a job at my current hospital), and also peds (I worked with peds patients at my past job at a pediatric rehab hospital and LOVED it.) I have also thought about going into orthopedics...

. I was wondering if anyone who has transitioned fields would let me know if the transition would be hard? Currently, I work days with a load of 6-10 patients. I do assessments, wound care, wound V.A.C.s, IV's (When needed), R.T. meds, blood draws, admits/discharges, foleys, ostomy bags, input MD orders when needed, and some trach care (and of course I give all my patients their happy pills aka narcs whenever it is due lol). Being in rehab, I also work a lot with transfers. I am about to start working on my ACLS, and plan on getting more certifications as needed. Before my RN position I was a tech for a pediatric rehabilitation hospital. Any advice would be great! I would absolutely love to work with mom/baby (Or peds). I may start applying soon but just thought to get some input How did you transition? Where to? Was it difficult? Are you happy with your decision?

Also any advice about the fields I have posted would be great!

Thanks all and I hope you all have an absolutely wonderful day! And thank you for all you do for the patients!
I'm in the exact opposite position--I'm a new graduate who just got an offer at a sub-acute rehab facility and I'm wondering if I should take it. I feel like it would help with my nursing skills, as well as leadership skills because I would be trained to become a charge nurse over the course of the year. The manager only wants a 1-year commitment. Should I take the job and hope in a year I can transfer to ED or another specialty, or wait and see if I get another offer...Either way, I'd love your advice about starting in a sub-acute care rehab facility!