It's usually better to start small and then build overtime. But if you have a deadline or you're in a dark place and want to change quickly sometimes you have no choice but to rapidly transform your life and go full blitzkrieg. I did it gradually. But it depends on where you're at and what you want to do. But in the end as long as each day is a net positive and you're moving in the right direction you'll get to where you want. The journey is the reward. Safe travels my friend.