Change of major

I came to Usa in spring 2015, and I joined a state university in california masters in mechanical engineering
, and took 3 subjects in 1st sem, I got low gpa. Now I am planning to take computet information system course in private small university california university of managemanagement and science college. It is small university. Is it a good university? Will it be a problem if I change my major to CIS program? Is that a good univ?