Hello and welcome. As an aside, why law? Are you planning to practice law, and if so where?
Anyway, I note one issue with Oxford is they are going to require you to report all your AP scores, and frankly I do not know what they might think about some of the lower scores. I note that the Law course at Oxford, like anywhere, is going to be a reading-intensive course, and so the 3s in subjects like English and History may be of some concern to them. I don’t think that means you should not apply, but I think it is a good thing to understand.
Obviously you already know about the LNAT, which is good.
Otherwise, you will need to be granted an interview, and then you need to do really well in the interview. I suggest you check out this page generally, and specifically the video on interviews:
https://www.law.ox.ac.uk/content/study-landing-page/undergraduate-study
The good news is their law course is not one where you need to know about the law already. But you do need to show you are going to be someone the tutors interviewing you would like to have in a tutorial. There is lots of advice online, but I always think the best idea is to make sure you are being an active and valued member of classroom conversations, maybe do some one on one time with your teachers as appropriate, basically practice being that sort of student.