Garden and saunna Design and landscape

The back garden is well maintained, and the grass is growing nicely. This year, I would like to design and landscape it to accommodate a sauna (bought) and an outdoor shower, create a path for motorbike parking, and include a tea table area as well as add more flowers, trees and climbing roses. The goal is to keep construction to a minimum while also reducing maintenance. The house is in Maynooth, a 10-minute walk from the town centre.