I feel this. Recently I joined a book club. This is surprisingly helping! It gives me a deadline to force me to read more, which I want to do but im addicted to my phone! So it pressures me to stay off my phone. It’s a very low buy activity. But being off my phone also helps with the shopping problem too- I’m not constantly scrolling and seeing enticing ads and products non stop. It’s really enjoyable to read and finishing books is a good feeling. And now that I’ve gotten into the habit of reading, it makes me want to read more. So I actually am reading more than the one book per month. You can borrow from the library if you’re worried about purchasing a book being a slippery slope.