What made you pick the NHS, specifically? As opposed to a charity, or a community law centre, where you could do something to feel as though you were making a difference whilst using your professional skills?
Anecdotally from my brief stint corporate side in the NHS when I just took whatever I could find post being made redundant, I found it very hierarchical and struggled with being treated like an idiot for being “just” a junior clerical worker. Now I’m much more experienced as a lawyer, I’d probably struggle to bite my tongue as much as I had to then!