RCIA programs run the whole gamut, so what you can and will get out of them will depend on many variables including the orthodoxy of your parish, the theological prowess of your classmates, your own knowledge of the Faith going into it, among other things. I went through RCIA three times before finally converting. The first round was, I’ll be frank here, a total joke and utter waste of time. I felt like I was in a grown up’s kindergarten class. I tolerated four meetings before bailing. The second time the course was more intellectually stimulating but it became readily apparent that the instructor was teaching contrary to the Magisterium, and the pastor didn’t mind that this was happening and in fact grew defensive when I brought it to his attention privately. This actually scandalized me and made me reconsider my scheduled baptism two weeks before Easter. The third time was much better. The curriculum was theologically sound, it was engaging, I got to know my classmates and we bonded. Nevertheless, I can’t say I actually learned anything new. I had spent the prior 6 years studying Catholicism on my own before coming to the decision that I’d convert and if anything RCIA just felt like a set of bureaucratic hoops I needed to jump through. Honestly if I had had the option to meet with a priest privately and receive the Sacraments of Initiation whenever he felt I was ready I would’ve done that instead.