Can I still get into universities for an LLB with A/Ls taken as a private candidate?

I took my AS Levels as a private candidate (I didn't attend school and self-studied my way through the syllabus at home). Therefore, my latest school record dates back to when I went to school before sitting my AS Levels, over a year ago. I left school as I was moving countries and ended up sitting for the exam privately in the country I moved to. However, I was only a few months into graduating from that school. I also have done multiple extracurriculars throughout the multiple schools I have been to (I have been in 3 schools in 12 years), However, I do not have a lot of outstanding achievements in these. I am sitting my A2 Levels in about 6 weeks and I am working to achieve A*A*B, the lowest AAC.
I take three A Levels: Law, Psychology and Biology, and I received an A(90), B(79) and D(58) for my AS in that order. I also have an outstanding achiever award for getting the highest grades in the country for my Law AS Level.
However, with the low Biology result, and the extra work I need to put in to make up for it, I have been stressed out over whether I can even get into a good university no matter how good my results are if I do not have a school record or strong extracurriculars to back me up. The reason I didn't go to school here is because there weren't any Cambridge schools I could afford to get into in my area, and most schools did the local syllabus.
However, I do plan on taking a gap year to intern at a law firm and additionally also get some external volunteer work done when I go back to my home country next year. However, I also have the option to go to one of the local schools and get a school record by taking their local syllabus on the side - this is a lot of work, but I am willing to work for it if necessary. As for my old school records, they are not in depth and there are a lot of gaps I can't fill in my record as that was the way in my home country.
I apologize for blurting everything I have on my head (especially the unnecessary bits) but I do wonder what would be useful for me to focus on and whether simply focusing on my A Levels would be enough for now to apply for universities. I am looking to apply to any universities in England, Australia and New Zealand.