You don't have to. Every IKEA store has shortcuts to quickly go to the section you want. And at the start, after the stairs usually, you can go directly to the restaurant and to the small stuff section, if you want to skip the furniture show rooms completely.

IKEA is actually awesome for this scenario.

You should start at the warehouse section and walk though it in reverse to get where you want to be.

Few things in life are draining like an IKEA visit.