I got MS(Computer sicence) admission in UCM and univ of colorado which one I can select

I am worried about opt after completion of my MS. Is University ranking also be consider to do opt in USA. I found UCM is good for my financial budget but I donot the ranking of university.so please advise me the correct univerity which will not give the problem in future for opt and h1 visa

We do not advise on schools. But, let me tell you something, if the school is not in top 20, ranking does not really matter. All you have to look is what is affordable and what has better education. As long as the school is accredited, OPT should not be impacted, the school does not matter. Also, H1B will not have much impact as long as you do your degree from a decent accredited school.