How many rituals can I do (ritual 1) from gordan winterfields books?

I’ve done 2 rituals in 2 days with 2 different spirits. Is there any limit to ritual 1?

No, as long as you do one at a time and fully commit to each of the rituals when you do them…just be careful not to get too tired or drained.
Also ensure that you are doing the rituals because they are needed and not because you are desperate or are hoping more = bigger results!