@Reearry
If you have an understanding of accounting/finance already, I'd skip AAT if I was you, as it's like a foundation course in accounting, but if you're capable, and can grasp financial concepts easily, it's an unnecessary extra step.
ACA is what I qualified as, however this usually has to be achieved under a training contract with one of the professional firms (EY, KPMG, PwC etc), and usually in either an audit or tax team. Pre-Covid, you'd spend a lot of time travelling to different client sites performing audits, though I'm not sure how they do that these days. Audit is great training for learning how businesses work financially, however I feel the early years of the professional training is more suited to recent graduates, or those who have less settled lives, due to the long hours and travelling around. Starting salary is usually about £25-30k, and by the time the 3 year training contract is up, you're qualifying on about £50-60k. Leaving practice after 7 years, 10 years ago, my first salary in industry was £80k.
CIMA is a management accounting qualification. Again, a personal view, it gives you a great understand of monthly costs, annual budgeting etc, less so financial modelling, controls and balance sheet. It's a fortunate management accountant who can progress to 6 figures plus without having solid control and ownership of the balance sheet. That said, you can study for CIMA part-time, in your own time.
At this stage, I'd go for ACCA if I was you. It's recognised across the world (ACA is a UK qualification, though there are overseas equivalents), you can do it part-time through distance learning, and it'll give you all round technical financial training. You'll learn about management accounting and financial accounting, as well as doing case studies as there are so many papers! You'd probably need 8-10 years of work experience with lots of progression to reach six figures, but it can be done. Good luck!