Switching from nursing to physiotherapy, also I have a police caution.

Hi guys, like the question states I'm in my first year of studying nursing but I have decided that whilst it is a great career and nurses are superheroes truly, it is not the career for me. I have decided to apply for physiotherapy after I complete the first year and use my certificate of HE to apply to do physio. I'm just asking if the interviewers would see nursing as a good stepping stone or not? I am working on getting some job experience.

The other thing is that I actually have a police caution for assault after I tried to force my brother out of our family home after he attacked our mum. This caution is being looked into by a police service that investigates wrongfully admitted cautions as it was not explained to me properly and the custody sergeant kept shouting at me when I asked questions. How would this affect my chances of getting into physiotherapy? by that I mean should I declare it on my UCAS or should I declare nothing and then explain it at my interviews? Sorry about the long message but anything you can tell me would be appreciated. Thanks again.