Honest answer: visible changes typically start showing around weeks 4-6 IF you're consistent.
The scale will barely move and might even go up slightly early on. That's normal and not a bad sign, it usually means muscle is being built at the same time as fat loss.
Progress shows in the mirror and how your clothes fit, not the number on the scale. Take progress photos every two weeks in the same lighting. Most people are surprised by what they see when they compare week 1 to week 6.
Give it 8-12 weeks before making any judgements about whether it's working.