Try to see the fun in science, pick an area of science that you feel passionate enough about to read and learn lots about it without this becoming a chore. Having said that you will have to get decent GCSE’s in science and maths, plus go on to do A levels. So my advice is work hard on your exams but develop an area of science almost as a hobby and if you are lucky you might be able to continue this hobby into your work as a scientist.
– Identify some goals you want to achieve, strive to get there, but be open-minded for side tracks, and look back on occasion.
– Record whatever you do for science in a way you and others (which includes you after some time) can follow your thoughts and actions.
– Keep in active contact with people who are (1) working in the same field of science, (2) working in a different field of science, (3) working outside science, (4) not working (like kids, pensioneers or patients).
– Keep in mind that there is more to life than science.
I would advise you to take science a levels and then pick a science for university study. The best piece of advice I can give you is to do something you enjoy doing. It is much easier to do your best if you want to learn about a subject.