As an ex-teacher, I have nothing but respect for anybody who works in the NHS, so given the demands of your job, I think you will fare better than most in teaching in that respect.
Honestly, the teaching itself (I taught Reception for almost a decade before starting my family) was wonderful. The time interacting with children is wonderful, I especially loved setting up all the independent play activities for them, the interacting and observing their play. Yes there was some challenging behaviour, but building those individual relationships over time meant this could be overcome.
The less good bits: the job never ends or feels finished, you really can always do more (terrible for a perfectionist like me!), I was often run down and ill due to talking/performing/being ‘on’ all day, there is a great deal of micromanagement of absolute nonsense that is absolutely not for the benefit of the children, and some parents were incredibly unreasonable and abusive towards members of staff at all levels. Some are actually banned from schools for threatening/swearing at staff (this may be nothing new to you having worked for the NHS).
I left because ultimately I wanted to be a SAHM. There is very little flexibility to attend school events/impossible to WFH if your own are ill etc.
My DH still teaches Year 3. He feels the job is unrecognisable in terms of the pressure put on the children academically and the amount they are expected to deliver in a day. He honestly feels done by 11.30am some days, takes a 15 min lunch break to eat as he has 150 books plus to mark a day, and would like to see our kids for dinner. He stays because he gets the school holidays with his own children.
Overall, I would have continued to teach if I hadn’t started my own family, it is enjoyable and certainly rewarding. I worked with very deprived children, and it felt meaningful to provide them with some secure care and safety each day.
Good luck if you decide to go for it!