Hey, just a bit of advice for you when picking your options...
Pick a range of subjects that will keep your options open when it comes to GCSE’s and A-Levels.
If you don’t know what you are doing as a future career, follow this:
Pick a language - Spanish/German/French (whatever your school offers)
Pick a humanities - Geography/History/Sociology (once again whatever you seem interested in and what your school offers)
Pick another subject - Computer Science/Business/Media/DT/Art
If you do know what career you want to do:
Search up universities you may want to attend.
Then search what career you would like to do.
What are their A-Level subject entry requirements?
Pick your GCSE’s based on this, since you may need a GCSE to continue the subject as an A-Level. For example, to carry on Computer Science at A-Levels, you will need a GCSE in Computer Science.
In terms of revision, don’t stress out too much. Perhaps, you could start creating your revision notes.
From doing my GCSE’s, I learnt that knowing these things were important to get through the exam:
Biology - knowing definitions of keywords and being able to label parts and explain their function (for example, where is the pancreas on the digestive system and what does it do?)
Chemistry - knowing the equations and being able to rearrange them to solve questions. Also, try to remember all the tests (e.g. flame test)
Physics - formula’s and how to rearrange them! Also, learn the conversions. I can’t stress how important this is.
English Lit/Lang - Practise writing essays and getting them marked for feedback
Good luck with your GCSE’s! Don’t stress out too much, they are not as bad as they seem.