Interior Design, Interior Styling, Colour Schemes

I am looking for guidance to help me move forward with my design for my new 1970s house. I dream of a green and cream shaker-style kitchen, with pewter-effect handles; open plan into a dining room with a dresser and banquette seating against the external wall. Through oak and glass double doors into the cosy, warm living room. All with oak skirting and architraves, metals in pewter or brushed nickel/steel.
I can see in my mind a pale version of an earthy (but not moss, avocado or lime) green, with a darker version as a feature wall of darker green paint or wallpaper in the dining half. Then this green flows through into the county-style living room with either dark reds or terracottas as a contrast.
But my issue is, I don't know which colours to quite pick - Farrow & Ball, Dulux, Valspar?! - and how to get this English country garden or woodland theme throughout the downstairs of the house without making it look like a forest has thrown up inside the house. I want it to look modern, but cosier than Scandi; and definitely not repeating the browns and avocados in the 1980s house I grew up in!
My partner and I are excited to do a lot of this work ourselves and I have a Pinterest page FULL of ideas for the types of furniture, furnishings and many shades of green that I like; but I just need that designer touch!
In essence: earthy but not rainforest jungle; English country but not stags and fox hunting.