34 years old. What kind of investing would it take to retire in my 40s?

Turning 34 next month and I can't get excited about the traditional retirement timeline. Every piece of advice seems to be "max your 401k, keep buying index funds, retire at 65." Maybe that's fine for some people, but the idea of waiting another 30 years before I can really enjoy my time sounds like a nightmare Asking from investing perspective: What would someone my age need to do to have a realistic shot at retiring in their 40s? How much would I realistically need invested by 40? Is retiring