Practise, practise and practise. Buy BPP book and kaplan kit then study and practise both. If you want to the point text then go for kaplan text book as BPP gives detailed study of subject. Better to do kit atlest 3 time before you appear in paper. Do kits of kaplan and BPP both. Now you can take advantage from mock available in your myacca account... You got enough time till Dec so don waste it thinking that and start from today. Hand practise is the Key.
I‘m also studying F3,we can study together.
You can get past exam papers from opentuition.com. go to opentuition.com and log in. There you will find a lot of interesting resources such as exam tips, past papers ... you can also download them. Don't forget!