Patio on sloping garden to house patio and access for shed door

Hi all

I am in the process of excavating to prepare a concrete shed base (yellow). The ground at the location has a slight fall. The shed will sit nearside of the photos, on the low side.

The door to the shed will be facing background, towards the natural rise of the land.

I am looking for solutions to allow the door of the shed to meet the area which will be paved (red), to negate the need to have a submerged patio to the right of the existing shed. The grey shows the line of a retaining wall which will be extended.

I have soil that was excavated that could be returned to site to raise any levels if the easiest solution.

What I would like to know is how would you approach and complete this?