Your grades are great...I think you should definitely aim to get as high predicted A levels as possible - and you will get that prediction sort of in the summer, or just when you return in Sept. In the meantime, when you're doing your work experience, or when you're running your clubs, reflect on what is it that you like about leadership/teamwork etc. Even if it's a language club, or scouts, you should be able to reflect on that. Also, UCAT - you can spend about 6-8 weeks just before your UCAT date.
Finally, don't get too stuck on which med school to apply to. There may be favourites (because you know someone who went there, or older sibling went there, it's nearby, it's your favourite football club whatever...) but until you get your UCAT score, and your predicted grades, it's really no point - so don't get hung up. You will see lots of 'I have to get into X'... don't do that. great if you do, but if being a doctor is your dream, then you'll go wherever your profile fits.
There will be some schools that will rate your GCSEs in some sort of algorithm. For those schools, you'll be competing with students who will have 9 9s. You can of course try, and do read up on their selection criteria, but each school will have different selection criteria... so, for best chance, you need to select strategically.
Good luck!