Focus on getting the best grades you can. Being able to show improvement could provide some reassurance that you are able, and the initial grades were adjustment, unfamiliarity, etc. Specific advice depends on your circumstances. How are you making notes? How are you preparing for exams (covering all past questions sounds suspicious: there's no way you can do so with sufficient depth for each)? Which books are you reading? and etc.
General things: assuming you type notes, when reducing them (as exam prep) do so by hand, and write out answers to previous / model exam questions by hand. Handwriting imprints information in your brain, somehow, and doing practise Qs forces you to curate information and figure out how things actually apply. You also need some effective memory techniques to remember cases / principles. Again, hand write: find some system that works for you, but in general, you should associate cases with principles. So, maybe you summarise a sub-topic in a flow chart, and you write out 4/5/6 words for a principle and have a case in brackets with a couple of trigger words, or 2, 3 cases--whatever is appropriate.
Also, what kind of feedback have you been getting? What specific things are markers and tutors telling you to improve on, or that are missing?
I would say 2:1s in law come from comprehensiveness and accuracy. Firsts happen when creativity and insight are added to the mix. Make of that what you will.