Yep 10kg sounds about right. You'll have books arrive adding up to about 4-5 inches thick... so if you think you can read through this amount within this period, plus the exam question bank, book it in for July.
... I think your giving yourself a bit of a task, but it may be possible. You want to give yourself the best chance of achieving the highest possible grades and rushing things isn't always the answer, but everyone is different.
I'm personally studying/working part-time, so I'm aiming for Module 1 around September. Remember no rush. Once you have sat your first exam, you then have 18 months to complete the last exams.