Problem I have is do I need to work in a "model"mode or a "page" mode.
I'd recommend working in Model Space ("model" mode).
Is there a way to set a model page,where after staring program X and Y position will be set to 0 ? or at least if I can have a 0 mark in the center of
Open the Options menu; click "Preference"; place a check in the Show user CS
block; click OK. The X, Y, and Z axes of your current Workplane will be displayed on the screen; the point where these axes intersect is the Origin (where x=0, y=0, z=0).
After I crate something in "model" mode I cant find it in a page mode.
When you draw in Model Space, then Paper Space ("page mode") merely provides a way of looking at specific views of the things you have drawn. You must create one or more specific views in Model Space, then go to Paper Space and create a Viewport for each of these views. To create a view, open the View menu and choose "Create view." To insert a Viewport, go to Paper Space, then open the Insert menu and choose "Viewport." See the Help file for more details.