Aww they love you though hahaThey do make it harder than it needs to be. There isn't a reason why you can't do more than one block at a time. Other building games allow it but you have to earn that ability which makes sense.
Terraforming at night is the easiest. Villagers are least likely to pester you. (Mine like to find me and walk circles around me for 30 min each or sit in my way)
Aww you quoted Bob Ross. That's great!!!Trial and error! I think it becomes easier when you’re not focused on making it perfect and aren’t so afraid of making mistakes. Some of my favourite parts of my island have been “happy accidents” as Bob Ross would say!