Hello, I'm trying to self teach myself web design & development, but I am having a bit of trouble understanding width and heights basically, I've designed a fixed website which looks ok in my browser (most pages other than the really small ones like about which doesn't reach a full page in 1920x1080) and now I'm trying to make it responsive so it'll look better but basically I want it to look as it did, and I can't see to do it and I image if I put the width at 50% it'll look bad in every size other than 1920x1080, which obviously isn't what I want.
This is what my fixed one looks like and what I'd like my responsive one to look like
http://tinypic.com/view.php?pic=j953l0&s=5
And this is what it's currently looking like (responsive)
http://tinypic.com/view.php?pic=2qa6yo2&s=5
Thanks a lot for your time!