It is a relatively simple process to become an account. For the first part you will certainly need to be numerate and have an interest in numbers. It also very much helps if you have an analytical mind that can read figures and solve problems. The final thing that you will need to do is to be able to manage money.
One of the best ways would be to contact accountancy firms in your local area. For example, for Accountants Swindon based firm https://chippendaleandclark.com would be an excellent start and ask for advice.
It is completely wrong to say that accountancy is on the dull side. It is quite a rewarding career and can certainly be rather lucrative. One of the most rewarding aspects is that you will not just be entering data and making sure that the clients books balance and are correct. You will also be required to look at those figures and interpret them. You will need to have some degree of presentation skills as well as you may have to illustrate findings and projections to the senior management.
Naturally GCSE Maths and A-Level Maths are a given but there are Business studies and Practice degrees that you can follow this up with. Most importantly you will need a professional qualification such as a CIMA, although there are others.