GCSE revision, 2 months left

Hi, so i am abit worried at the moment.
I have only 2 months left to finish my revision for my gcse to the best of my ability because i am aiming for all 8's and 9's.
I did start basically in January, but it was extremely slow and i don't know if it was effective.
I have recently had mocks and they did go really well but my method of revision was a bit long.
So my question is 1) do you think I have enough time before the first exam to learn everything to a really good standard before the exam to get 8's and 9's
2) does anyone have any methods i could use to understand the content faster (esp in geography and biology)
my predicted grades are:
bio-7
physics-7 (got a 9 in mocks)
chem- 7 (got an 8 in mocks!!)
maths- 7
French- 7 (got an 8)
Geog- 8 (got a 9, but it was only paper 1...)
Music-7
FM- Never done mocks before
English lit- 7
English lang-7
Please i need advice!!!! thanks

i would use quizlet and deffo past papers on pmt
u deffo have ages to raise ur grades

i would use quizlet and deffo PAST PAPERS on PMT
u deffo have ages to raise ur grades