Then just take a piece of paper and start writing down what is important to you:
Space for hobbies / which ones?
Carport or garage or double garage and storage room for bicycles and garden tools?
Basement (apparently already counts as a condition for you since it's a hillside property)?
Open / closed construction style?
Gallery?
Children’s room?
What do you like? Search for photos on the internet
Brick, wood, or plaster facade?
Visit model houses and photograph what you like, whether construction style, layout, equipment, or anything else.
How many rooms and what amount of space is needed?
From this collection, an architect should be able to draw something usable. It won’t be perfect at first, but this is how you gradually approach the result...