Many Bitcoiners face this struggle, I definitely have bought way more books than I have read!
My advice is to follow the Middle Way - avoid extremes of being too frugal or too much indulgence.
Ultimately you need to have self compassion and patience to switch over from a high to low preference timeline.
Personally, I'm going to experiment with fasting one day a week (36hrs) and any fiat saved will be allocated to Bitcoin, aiming for approx £50 a month.
Fasting has been shown to have many physical and mental benefits and is something I used to do years ago but got out of the habit.