Mine was very atypical; the entirety of my RCIA was less than 6 weeks.
What is normally done around here, though, is that the CCC is used throughout the full 8-ish months as a reference text rather than assigned reading, per se, although there might be assignments. Other parishes will do it differently. The Catechumenate itself doesn’t change things so much as just the calendar timeline itself does. Let’s say RCIA begins in September, and the Rite pf Acceptance is in November; nothing really changes with classes, etc. until January. There’s a shift from learning the generalities of who God is and the history of the Church and so on to the everyday living of being Catholic - the sacraments are explored one at a time, and for argument’s sake, if Easter is in April, there will be things that happen in March like retreats. Lent will be when we start dismissal during Mass, the Rite of Election, the scrutinies, and all the rest. Otherwise, it’s not a significant or noticeable change.
What is different as a catechumen is that you are in a recognized different status within the Church according to Canon Law. You can be afforded certain rights that non-Catholics typically aren’t granted except as “exceptions” under the law, such as a funeral Mass in the unfortunate event of death.