A level is NOT for everyone. You can consider American SAT. It is much easier and is recognised worldwide including the universities in the UK/AUS/CAN/US/Asia/etc etc. All you need to do is to repeat the practice paper again and again until you achieve a high enough score to meet your desired university expectations. You get free access to 6 practice papers on Khan Academy online.
In Malaysia, we have a lot more choices in pre U qualifications, for example, the Australian AUSMAT/SACE/Candian high school diploma where the assessment is 30% on exam and 70% on coursework, American SAT (maybe year 9-10 difficulty, it is multiple choices, the key is speed and accuracy), Foundation (offered by individual university), IB (higher than A level), etc. Unfortunately only A level is offered by schools in the UK.