Hi Chrissy,
Its great to hear you are looking forward to your next chapter! Trust me, if you keep on top of your content/notes, and keep organised then you can 100% succeed and really enjoy the next few years 🙂
You don't have to have your uni/apprenticeship decisions all worked out yet. My advice would be to focus on one thing at a time - spend awhile getting used to your new routine as a sixth former, and then once you're into year 12, have a think about your strengths, interests and any goals/ideas about where you might want to be in future, and talk to your careers advisors, your parents and visit a few unis' open days to start looking into courses you might be interested in.
You're right, doing your A-Levels will be a big help for you in deciding on what you might want to take further! Just focus primarily on what you are good at, interested in and what will get you to a potential career you will enjoy.
I hope this helps and best of luck this year and beyond!
University of Bath