u/frmsbndrsntch

Bought our first house back in December. 1969 ranch in the midatlantic USA. The entire house seems to be plaster over I'm guessing gypsum board (edit: The house is timber frame, there's no brick). The plaster is heavily textured with swirl patterns.

There are a lot of holes throughout from old picture hooks, some quite deep. See pictures - that's a USA quarter for reference.

I've never lived in a house with plaster before, so this is all new to me. Obviously filling in the holes is the main objective, but you also want it to match the adjacent texture so it disappears after painting. Do I have any hope of accomplishing this with this swirl pattern on everything? Pointers / tutorials / pulling expectations back? Not sure where to start.