Stairs come back sooner than most people expect, with one simple rule:
Going up: lead with your non-operated leg, then bring the operated leg up to the same step. Going down: lead with the operated leg, then follow with the other.
Use the handrail whenever there is one. If you use a crutch, it moves together with the operated leg. If your surgical team or physiotherapist showed you a different way, follow theirs.
Start with a few steps with someone nearby, and build up. When single steps feel easy, normal step-over-step stairs will follow - for many people somewhere in the next weeks, and later is also normal.