I want to remove a wall dividing my living room from my porch
You want to remove an exterior wall that is integral to the structure of the building so you will need to know how to provide a suitable, to code, way to support the load that the wall is carrying.
Suggestion:   Hire a Structural Engineer to tell you what is required.
You will need a structural engineer to size the correct beam and post system that will be needed to replace the wall.