Is Oxford Computer Science Realistic for Me?

I am currently in year 12, shortly going to sit my mocks.
At GCSE I got nine 9s and three 8s.
At A-Level I am taking Maths, Further Maths, Physics and Computer Science, as well as an EPQ which I am doing on a computer science topic. I obviously don't have predicted grades yet but am fairly confident that I can get all A* predicted (or at the very worst a single A and the rest A*).
I have led and participated in several mathematical competitions with fair amounts of success (some group competitions I led resulted in having my school's name on a website, etc.) and got invited to sit the Oxford University Computing Challenge (Elite?). I also have several computer science projects(research papers, coding project, etc.) in the works which are fairly interesting and will hopefully have them complete by the start of next academic year. I have purchased a book on Quantum Computing and am intending to read a few other CS books over the holiday, as well as complete every MAT paper. However, I'm not sure if I will be able to secure a work experience worth talking about on the personal statement.
Do I stand an actually good chance of getting in? Or at least getting an interview? I'm asking because I've read so many posts about people having solid academic credentials, but not even getting an interview. One poor guy had a 5A* predicted and good supercurriculars and didn't get a single one of his 5 unis, let alone Oxford, which is making me quite nervous. What more can I realistically do to increase my chances of getting to interview?

I am currently in year 12, shortly going to sit my mocks.
At GCSE I got nine 9s and three 8s.
At A-Level I am taking Maths, Further Maths, Physics and Computer Science, as well as an EPQ which I am doing on a computer science topic. I obviously don't have predicted grades yet but am fairly confident that I can get all A* predicted (or at the very worst a single A and the rest A*).
I have led and participated in several mathematical competitions with fair amounts of success (some group competitions I led resulted in having my school's name on a website, etc.) and got invited to sit the Oxford University Computing Challenge (Elite?). I also have several computer science projects(research papers, coding project, etc.) in the works which are fairly interesting and will hopefully have them complete by the start of next academic year. I have purchased a book on Quantum Computing and am intending to read a few other CS books over the holiday, as well as complete every MAT paper. However, I'm not sure if I will be able to secure a work experience worth talking about on the personal statement.
Do I stand an actually good chance of getting in? Or at least getting an interview? I'm asking because I've read so many posts about people having solid academic credentials, but not even getting an interview. One poor guy had a 5A* predicted and good supercurriculars and didn't get a single one of his 5 unis, let alone Oxford, which is making me quite nervous. What more can I realistically do to increase my chances of getting to interview?

Obviously I can't say whether or not you'll get in, and I'm not an expert. But I did get an offer for the course having done less than what you're doing. You seem like a competitive candidate to me.
Your plan to do MAT revision in the holidays sounds good; you could look at TMUA papers if you run out of practice for the multiple choice section. I'd recommend starting interview prep around November. CSAT questions helped me a lot.
It's an exhausting process, remember to take care of yourself. Good luck!

Thanks for that
Did you get admission recently (i.e. in the last three or four years) or has it been a while since you joined Oxford CS?

Ah! Congrats! For which college?
What kinds of things did you include on your personal statement? And also do you know what your score was in the MAT? Any advice for the interviews?

Thanks! I got an offer from Jesus College.
I relied pretty heavily on access programmes for my PS. One was a research placement. Aside from that: a MOOC I didn't understand much of, teaching younger students, a brief mention of coding projects, and painting.
I got 48 on the MAT - I wasn't feeling well on the day. I got 9/10 on the resit.
I'm not sure what to say about interviews that isn't obvious. They're not as scary as you'd expect, you might find that you enjoy them. Don't worry if some go badly, or if you end up saying silly things.
The worst part for me was the period after interviews and before decisions come out. I wasted a lot of time getting stressed about it. At that point, don't bother worrying yourself over statistics and trying to work out whether you got in or not - there's nothing more you can do. Keep yourself interested in your other uni choices, it'll make the process less stressful regardless of the outcome. I hope this helps!