You don't just write a long list your work experience placements. You pick two or three moments from your work experience and use these to show that you have the qualities expected of a doctor.
What surprised you about working in an Aged Care Home? What did it teach you about talking/communicating with older people, the realities of end of life care etc etc. If you shadowed a GP or another health professional, what was most of their time spent doing, how did they explain things to patients, work with other staff, etc etc. What volunteer work have you done - why did you do it, what do you get out of doing it, can you use this and any other things you do in your spare time to show altruism, communication skills, understanding of people from different backgrounds to your own, etc etc.
This is why you do work-experience - it isnt just ticking boxes, its about learning stuff, and reflecting on what you have seen, thought, and done. This why Unis are not interested in bits of 'I spent 2 days with a world famous brain surgeon' type showing-off and prefer 'I've volunteered every Saturday for the last 6 months at/with ... and from this I've realised ......'.
It isnt about the amount of work experience you've done - its how you utilise examples from this in your PS as hooks for showing important things about your attitudes, understandings and behaviours that matters.
And remember - you need to have actually done this work experience before you write your PS, ie. before September.