Hi,
Yes volunteering is a good option if you are struggling to find work in your chosen area, as it will still give you experience, which is what most places are looking for. This shows you are dedicated, hardworking and passionate. Volunteering one day here and there, probably wont be enough to be considered for a job though. So if you can, try to find somewhere you can volunteer consistently until you find the job you are looking for. If you are looking to volunteer for experience for a uni application, it will also be really useful and a great thing to do to help with your application.
I hope this helps!
-Victoria
Wrexham Uni Rep