hiya!
im a y12 and looking back on my mocks they semi-accurately predicted my final grades
id say you are very likely to achieve the grades you've listed (especially with practice exam questions and self belief!)
few things to note: my first set of mocks in y10/start of y11 were atrocious compared to what i achieved at the end - time really does help, i promise!
also i was predicted a 3 nines and ended up with none at the end of the day
this did initially upset me but it is important to remember that if you tried your hardest THATS ENOUGH!! (not to scare you because i believe youll do well especially with 9s already!!)
very best of luck and feel free to ask questions or for tips!
ps: tip for history
(i took edexcel and got an 8 but im sure it applies for many boards) i think in my exams that i hardly mentioned key dates HOWEVER THEY ARE IMPORTANT!!! but mainly make revision materials in the way you would answer an exam question ie a flashcard with reasons, consequences and EVALUATION! especially for high mark questions