Most people get the materials a week or more before Indoc...so if you have any spare time in Indoc, or now MECC (now right after Indoc) to study concurrently before you are sent to your aircraft specific training.
That having been said, it seemed most were just very familiar with the materials. The more the better, but like any program, you must meet the early requirements before the later.
It is hard, but rewarding work, and study habits you MUST have down before going into any aviation job.
Spoon-feeding, it is not.
But fair IMO it is. Competent pilots will pass, and become better. Weak ones will wash out since they have gotten a few free passes in the past.
Show up for your first day current, stay focused, and be ready to work. Don't be "that" person who flies home for a weekend (or complains about a weekend sim session stopping one from doing so), then fails the basic knowledge test...
Know for a couple months you will not have much free time.
But remember, this is a real job. Expect to work, maybe get your hands dirty, and be flexible. You are getting a shot at doing something you have spent your career waiting for.