You correctly draw everything at 1:1 scale in Modelspace. You have a Layout set with your titleblock, and a viewport(s) showing your drawing in modelspace. You need to set the scale to that viewport to plot the layout.
Open the Viewports toolbar (see previous posting here), select the viewport, then use the Viewports toolbar's pulldown menu to select a predefined scale. If needed, you can resize the viewport to better fit your view, and double-click inside the viewport to pan your view inside the viewport (be careful not to zoom, this will remove your viewport scale).
Don't forget to right-click the viewport and lock it so that the scale is never changed accidentally.