I promised to do a God ritual 30 times, I think I did it twice, then I got involved with school and for some reasons I couldn't do it for a week. Should I do the 30 rituals continuously to keep this promise? I mean, should I start again?
It was also said that a God ritual has to be done 3 times to be effective, let's say we did it twice, some time passed and we did it again, so we completed it to 3. Does that count?
I have problems with consistency...
Before you can make giant efforts, you need to make small efforts. You mentioned you have problems with consistency, so it would make more sense to do a God Ritual for five, then ten days in a row at first, like a normal schedule we have. Once that becomes manageable, you can start to make longer strides without much worry for failure, as you have already progressed to some extent. Additionally, you need to prioritize and manage your time so that important things get done.
I do not know who said that about the effectiveness of these rituals. A God Ritual is effective from the first one done. They open up more as you advance, though. But they are effective and real from the get-go.