Hey gorrilla, there’s a wealth of information on the forum to help you with shaping and building your first board, and lots of guys with knowledge and experience who are willing to share. Your original post was kinda vague, to me anyway, so maybe others felt the same. I didn’t really understand what your questions were, specifically.
As far as where you want to put your widest point in the planshape, you can look through the Quiver archives and get lots of ideas, also might give blendingcurves.com a try, there is a variety of templates there also. Bumps, wings, hips, and curves are all part of the template shape, although on your first few boards it seems that simpler and cleaner templates are best, save the stingers and bumps for later on.
Fin layout and placement is dependent on a lot of factors, foot size is not one I’ve ever heard of 'tho. More often its board shape, type of waves being surfed, skill level and preference of rider, etc.
Rocker Apex is kind of a loaded term, with no one clear definition. You could do a search using “rocker apex” and get a lot of food for thought, 'tho, as its been discussed on here many times.
I don’t know if any this helps, it probably doesn’t answer your questions, because like I said, I really don’t know what exactly your questions were. But maybe it gives a little more food for thought, or areas for research, or maybe it’ll help you explain more clearly what you’re trying to find out.
If you want some surfboard design advice, you might try posting pics and giving more details of yourself, your home break, your favorite boards - so that people have a better idea of things like your age, size, skill and experience level, type of waves you normally ride, etc.
You can always begin by copying a board you like a lot, then trying different modifications on successive boards, to see what works best for you. Which I think is what Brian was getting at with his comment to start shaping and see what its all about. Eventually, you might end up like a lot of us here, with more boards than you need, and more on the way. Its a rewarding addiction, making surfboards.