Wheel bearing?

I suspect I have a bad when bearing, loud whirring noise but no other signs yet. 2019 WRX base all stock (except CB exhaust) at 75k miles. I have the 7 year warranty, any idea if it’s covered? If not, what’s the expected cost for a garage to do it? Alternatively, how difficult would it be to do myself? As you can tell I’m kinda strapped for cast at the moment but don’t want my car to lose a wheel on the road. Thanks in advance!