What to do in y12 for best shot at Russell group unis later on (economics?)

So I’ve been in y12 for about three weeks and I’m doing maths,fm, economics and history and I got really good gcses and am really interested in both economics and history . I know it’s early on but I feel like this year matters a lot for uni admissions and was wondering what I could do this year in terms of extra curriculars, epq etc to possibly go to a really good uni for economics later on .
I know I’m doing 4 but there’s several topics of economics that I have a massive interest in and I think maybe I could really enjoy an epq? Maths honestly isn’t that bad apart from the homework amount .

1. Keep your grades up
2. Engage in super-curricular activities in your subject.
3. Try to have some practical experience in your subject area
4. Engage in your school activities to get leadership position or valuable experience
5. Visit unis of interests during open days
6. Ask for advice from your school so they can put you on the right track.

Thank you. I’ve been reading some books on economics but the only ones I’m unsure about is getting practical experience in subject area or having positions of leadership in school stuff . Nothing at school on offer is remotely related to economics like the music band I take part in but I’m pretty alright at leadership stuff(I have experience teaching basketball as part of d of e). I don’t know if that counts for anything

Thank you. I’ve been reading some books on economics but the only ones I’m unsure about is getting practical experience in subject area or having positions of leadership in school stuff . Nothing at school on offer is remotely related to economics like the music band I take part in but I’m pretty alright at leadership stuff(I have experience teaching basketball as part of d of e). I don’t know if that counts for anything