How to secure a slope and design a garden entrance cost-effectively?

Will balance out well by filling in so that you can get into the garden without steps. Although it is somewhat deceptive. For example, I find our driveway looks quite flat and then it was still 1.2 m or 1.3 m at the garage. Does the tree still belong to you?

Yes, the tree is still ours. The garden goes quite a bit further up the hill. I need to look for the plan soon. We probably also have to level another terrace further up so that there is more usable space.

Whereas maybe some slope is not wrong. Sled, slide, etc. Would not level everything out

Outdoor area 1.0
Access to the "terrace" and sand playground

Hopefully, the temporary solution won't have to last that long