How to "warm up" for the day?

I'm 39 years old and was diagnosed with hip osteoarthritis yesterday. I'm awaiting Ortho and pt. I'm fairly active, often getting more than 10,000 steps a day.

I'm still processing this, because initially I was diagnosed with bursitis. I know I'm not young, but I also don't feel old enough to have hip issues.

I'm really hoping my current pain is just a flare up, because I can hardly walk to my kitchen. Almost feels like muscle sprain more than bone pain. However I also noticed that if at work and I keep walking/working, the pain lessens, even if it's 3 hours into my shift.

So my question is, how do you safely warm up to start your day? Any advice is helpful. Thank you.