It is a lot easier if you did PPL theory before this. (assuming you did.)
On integrated courses there are people going halfway through the theory phase before they really understand what IAS and TAS is.
Not their fault, they arrive the first day and within an hour they learn about Otto cycles and VIGV's.
It is much easier if you know basics first.
IMHO there is nothing wrong with learning the question bank. Some integrated theory classes have written tests with both multiple- choice and open questions, and many students who know the theory well have more trouble with the first.
Some of those mc questions look like they have been translated from an obscure language on friday afternoon and can be hard to comprehend.
And do you really need to know what VIGV's are before you step in a Seneca
And yes, you can do it in 1 year.