If you'll do hard work then by hard work of 6 months you can achieve your goal but you have to start studying for it dont waste your time its a very important year so please dont waste it otherwise you'll regret.

Hello dear,

Hope you are doing well!

You can surely get 85% marks or even more if you stay consistenst with your studies. I guess 6 months is enough time to complete all the syllabus. You just need to stay consistent. You just cant afford to miss even a single day from now onwards. You can study 1 or 2 topics of each subject every day.

In this journey, youtube might be very helpful to you as a lot of classes and courses are freely available. You can watch one video everyday.

So you need not to worry. You can reach your goals. And again, consistency is the key here.