Self Study
If you have the will to do it, there is nothing wrong with self study. In my study days ( the beginning of commuter services in Eastern Australia), I studied for the lot, sat for the lot and thankfully, passed the lot, at the same time as flying full time. I used to study every weekday after flying and kept the weekends for a beer or two. The whole exercise took me about a year.
In those years it was the "College of Knowledge" that supplied most of the information!
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