You can of course, but getting A*A*A at A-level, a great PS, top BMAT and solid interview performance is very difficult so don't underestimate the work you'll need to put in.
Yes, after speaking to the outreach reo who came to my school, i found that the average is about the same but was 6-8 A*...so really you are definitely on the right track all thats next is to get some relevant work experience and finding stuff to make your personal statement a killer (also congrats on your grades)