from scratch, not uploading a GEDCOM, is extremely easy and rather scary.
I'm just putting up a basic tree on ancestry and the amount of help it wants to give is scary. It suggests potential parents, with a full list of children, although it doesn't add the children to the tree.
It seems to compare to other trees and if the details are close it offers it as a match and adds the details in if you wish. It just offered me a woman by listing her children, no other details but added in dates of birth and death and a photo it had got from another tree. I don't know the date of death, nor do I know if the photo is correct.
It is so, so easy and now I understand the number of identical trees on ancestry. There is no hard slog, no searching for misspelled names, no comparing 15 census to find your person, just a blinking yes, no or maybe button.
It's no wonder people can finish their trees in a week.