Years ago I tried to keep fish with little success. It was hard to keep them alive. I tried the exquisite dwarf African frogs and they were, by far, my favorites and the most heartbreaking to me when they died, one by one, not long after I got them. Don’t know what I did wrong but I found all of these creatures to be very sensitive and I came to feel it was wrong to keep them.
Also, if you don’t keep the tank clean (but remember to retain some of the old water for bacterial and PH balance, which is tricky too) the tank will smell. And small dorm rooms tend to get smelly without any help from the fish!