Finally admitted to myself that the old way isn't working anymore

I've been running my distribution operation in Ajman for about eight years now and I think I've been clinging to the way we've always done things for way longer than I should have. We've grown steadily over the years but my processes have barely changed, and lately I've been noticing that the same problems keep popping up over and over orders going out late, mix-ups in inventory, staff getting frustrated with how things are set up. I finally sat down last week and forced myself to really look at everything honestly instead of just patching problems as they came up, and it became pretty obvious that I need to figure out how to improve overall operations with new methods instead of trying to make our old systems work for a volume they were never designed to handle. I've been reading about modular approaches to warehouse management where you can add pieces gradually, and that feels like it might actually work for me because I get nervous about big expensive overhauls that might not deliver what they promise. I guess I'm just at that point where I know I need to change but I'm not sure which step to take first, and I'd really appreciate hearing from anyone who's been in this position after running a business for a while. How did you get past the inertia and actually start making meaningful changes without feeling like you were tearing everything down?