As not all colleges offer the EPQ, it is often just seen as an extra. It is something to talk about in your PS and interview. However, it seems you have much better things to talk about. In my opinion, having one or two decent pieces of work experience is the most valuable thing.
I would concentrate on getting good grades and doing well in the UKCAT. A strong UKCAT can make a HUGE difference.
In regards to the netball and singing etc. remember that the personal statement isn't very long. Lots of people play sport or a musical instrument, for medicine they care more about your work experience and whether you are a caring and compassionate person. Concentrate on your work experience, your reasons for wanting to do medicine, etc.
Once you begin to write your personal statement you will realise how little 4000 characters really is. This is nearly 300 characters: 'I'm on the netball team therefore this involves me working in a team and cooperating with others. Because I sing and play guitar I am able to perform which builds my confidence which would prove important as a doctor because you need confidence in order to speak to new people.'
If you want to mention skills such as team work and communication then link it into your more medically related stuff. Or you can just save it for interview, e.g. they ask about times you have displayed good communication skills and you can talk about your work experience and your extracurricular activities.
I've got an offer to do medicine this autumn, if you want any tips or anything feel free to message me.
Lauren xx