Spring Force Analysis for a C Shaped Leaf Spring

I am in the process of designing an oblated C shaped leaf spring for a 3D project and need to get some spring force calculations done either as a simple spreadsheet model or using FEA if it is warranted.

This is to enable material selection which is nominally to use a 0.3mm thick spring stainless steel material.

The spring has a cutout through the bend in the C Shape making things a little more complicated but it is still a simple compression style leaf spring.

Once the range of forces and materials is understood a few iterations of the 3D CAD maybe require re-calculating the forces.

I am looking to understand the compressive forces between the Spring's Jaw feature (marked) and the opposing flat spring leg. In practice the in its relaxed (compressed state) the jaw will come to rest on a 1.2mm thick component that will be inserted under the jaw and it is the force exerted on this that i want to understand.

A full Fusion360 3D model is available should FEA be worth performing on such a simple part.

An NDA will be required.