First off, work hard from the start. With Edexcel Maths/Further Maths, they both require a lot of practice, but seeing you got into Further Maths in the first place I'm guessing you don't need much advice on them. The papers don't vary too much from year to year, so past papers should centre around your revision plan about 2-ish months before (that's what I did anyway). Wasn't too difficult with support from teachers when I was stumped. Workload wise, fairly decent. Maths is a subject you either enjoy or hate, and the former applies to me personally. Good solid subjects (Maths/Further Maths-not done the other 2 at A-Level). However, I did do Biology AQA at A-Level, and workload wise I imagine it wouldn't differ too much from Physics. Very content heavy, and you'll be doing Mechanics in Further Maths so that will inter-link with Physics. Accounting stands out as an outlier, though. What made you want to do Accounts? I did a module on it during my first year at University, and got 74% having never done it before, and you do need to spend a lot of time on it, just like Maths, it comes with practice. All the best.