Can a visit to Rwanda, Seychelles, and say South Africa be good enough to make a travel History for US and Canada visa applications. I am Nigerian, and I have a job and I am in Civil Union.
You appear to be confused about the intent of the "Travel History" question.
This question is a factual statement of where you have traveled. There is no minimum requirement for the number of countries you have traveled to, nor any specific requirements for such countries. If you have visited zero countries other than your home country, then that is the correct answer to the question. If you have visited 10 other countries, then you should list those 10 countries.
In general, the number or even the specific countries will not have an impact on your application, however there can be exceptions if the consulate staff believe there is some form of pattern to your travels which might prevent you being eligible for a visa.