Structural Engineering for Front Porch

I am looking for some engineering assistance with a concrete slab front porch that I am putting on my house. The slab needs to span a maximum of 10ft over a cellar below. On the house side, I have a 1.5x4" ledge and the foundation for the porch is 8" CMU block. Constraints: 1. Utilize the 1.5" 20 GA corrugated steel which has already been ordered 2. Little to no modification to the already built conditions (shown in the attached drawings) 3. Top of slab should be within 7 inches of door threshold. 4. Slab should be supported by existing block ledge on house foundation, not the wooden structure of house. Priorities: 1. Structural integrity for the life of the house. 2. A cost-effective and simple to implement solution. 3. Keeping the slab as thin as reasonably possible to minimize weight and cost. Desired work product: I am an engineer myself, though not a structural engineer. I would like to see some calculations so I can understand why your solution works and will be safe. I will also need a drawing to explain your solution so I can implement it. I am mostly doing this DIY so I need to be able to understand how to do it and we need to arrive at a solution which doesn't just look good on paper but is practical to implement. I do not necessarily need any kind of officially stamped or signed design, but I need a knowledgeable professional who will design it to the standard that they would put in their own home.