Sell your positives, don't dwell on the negatives. When you do your access course they will help you write your personal statement, and you say what experience you gained from working, customer interaction, all that stuff.
It would not be a problem getting onto a degree from being unemployed, although you might want to try to get some volunteering experience, alongside visiting a physio department. This would show you did not mope around while being unemployed and were willing to help others. As for the physio work experience, start looking now. I'm training to be a dietitian and, with all health professional courses, shadowing can be hard to come by. I started looking in the July before I started my access course and got some straight away, but it can take time to organise and find a place that will have you.