The problem is that as you say, you just started to study web design. Therefore, you simply do not yet understand what proportions should be, you do not think about the various sizes of monitors and a lot of other things.
I'll tell you so, if you are trying to make it so that on your monitor 1920 the design looked like in the Muse 960 you will get a very large design, from which the eyes will scatter. At the moment everything is normal and nothing needs to be changed. Looks great.
But if you still want to try - use breakpoints .