yes it's definitely possible
You just need to do 1 hour - 2 hours a day. Try not to separate out 3 unit and 2 unit, because by doing 3 unit you are automatically covering 2 unit. Topics such as algebra and linear functions are much easier to cover and you can do this in 2 days! Don't stress, just stay dedicated
my exams are coming up and i'm aiming to cover 2 and 3 unit about twice in 2 weeks. Make sure to do past papers if you feel you are running out of time. In most of my previous assessments I just did past papers, and did pretty well, but this only works if you're up to date with homework!
Good luck