Hey, I will also fly to Rio for the carnival in 2024. I was already last year in Rio and have already done most of the touristic things. So far I plan to go on 11.02 to the Sambadrom and possibly to the Magic Ball in the Copacabana Palace (although that may be too expensive). Otherwise there are all the parties (blocos) on the street.
Small note: Hardly anyone in Rio speaks English. Spanish can help, but it does not have to. Therefore, it may help to learn a little Portuguese beforehand via an app.