tips for sixth form/uni

hi i just finished my gcses and was hoping to get some advice about the application process such as extras/supercurriculars. i believe i performed alright/average with perhaps 5 9s 3 8s and 2 7s but hoping to get much better on results day eg 6 9s and 4 8s. my extracurriculars arent exactly that many; ive done some sports clubs like netball and other things ive done within the school scope include participating in the young citizens mock court trial in y9 as a court reporter, completing the Junior Physics Challenge and the UK Biology Challenge and also the space physics challenge achieving either bronze and silver in all. other things ive done which i dont exactly know if they are super or extra curriculars include work experience as an accountant giving me knowledge on anti money laundering etc which i could insert in my personal statement, although not law based. ive started reading this book called 'what about law?' and hope to read many more law based books. in the coming years i hope to gain actual law experience in firms and continue to read or listen to podcasts. could i please recieve some advice about law at cambridge? thanks