Anyone here who got their gallbladder out years ago? Worried about long term effects of removal

Hi I am awaiting surgery and I've been reading the posts in here, some people saying that they started having issues with their digestive system or pain years after the surgery, I wonder how common this is?

All my doctor said is that I'd have to follow a diet after surgery for a month and then I'd be able to eat whatever I want but I think that’s bs. I am honestly very worried about life without a gallbladder and just hoping for the best