I also think a garden is never finished, but we spent six a half years creating our last one and - whilst there were still a few wild areas - it did resemble a proper cottage garden when we sold in 2024.
When we purchased the house the EA described the (0.5 acre) outside space as "magical", by which they meant it was a weed-infested jungle with a 60' fallen beech tree laying across the centre!
There were a few lovely features - a grade 2 listed partial boundary wall (the house itself wasn't listed), a leat dating from when the house was a mill, more huge trees (beech and oak) along the front boundary, and an ancient apple plus a fabulous mature acer we failed to spot when viewing the house as it was the depths of Winter. But the house had been repossessed and uninhabited for ages, before which it was a rental for a while, so the garden hadn't been cared for.
Despite all this it was on the Historic Parks and Gardens register for Wales!
A tree surgeon we befriended cut the fallen tree into huge 'slices' which we dried out and chopped into logs for our two wood burners.
We cleared the weeds by hand, hoping to find some plants worthy of saving, but apart from the acer, plus another smaller one, loads of laurels, a couple of perennials and some holly, there was nothing.
We made some expensive mistakes initially as the conditions were challenging (30+ box balls, 70+ alliums, 25+ lavenders all died within the first year). But we'd brought lots of plants in pots from our previous house and most of these survived when planted out.
Gradually we dug out beds, adding tons of shrubs and perennials as well as 60+ David Austin roses. We planted more fruit trees to make a small orchard. I removed a large patio near the front door and reused the slabs to create paths through and around the four rose beds. Tons of gravel was added to make further paths and some bricks reclaimed from a wall we removed inside were used to make a circular seating area to survey our efforts.
There was also a walled courtyard which we tackled before anything inside or out, building raised veg beds from oak sleepers. This became our little oasis - somewhere to escape to when the internal (DIY) renovations got us down. By the time we sold, the garden was actually quite magical, but now we're starting again with a paved seaside courtyard in England 🙄😆