I started doing this about a week ago, and it's nice to hear it took you a month, because it's kinda been painful this past week.
I still unlock my phone and look at the homescreen only to realize "oh yeah, I removed that stuff so there's nothing to do here". I'd thought that by removing social/news feeds, I would find something else to do with my thoughts by necessity, but really nothing has replaced the "open phone for 30 seconds to find something briefly entertaining".
I was expecting to be bored, but it's more of a low-level frustration at all times except when I'm focused on something, like I know I could be finding some trivial but interesting thing.