Need some advise Theme Copy From Wix

my Client is coming from wix and I have selected your product because of its similarities, there current site is here
am I going in the wrong direction by using the upfront builder to make the theme look like that one?

I can not get the foot to behave the way I want it and I have not figured out how to change the page width in pixels is it possible?

Additionally every draggable seems to snap to a grid is ther an option to allow it to place anywhere i want while still maintaining mobile friendlyness?