Hot temperature warning, engine running rough, stall

Hello, my vehicle developed a problem while I was out driving around. The first indicator was some blue smoke, it looked like it was coming from the Overhead Valve covers. I did not detect any fluids dripping, running, or being dumped on the ground. Then it started to run erratically, so l pulled over, it acted like it was overheating, but both fans are operating correctly. But when I tried to drive it, it shut off again. It would not start, but did so after 10 minutes. I heard some rattling noise, it sounded like some transmission noise, but not 100% sure of that.

I got a "Hot Temperature" Warning light, after it shut off a 3rd time, so I turned off the engine, but the water/coolant temperature gauge was at a normal operating temperature. I heard what appears to sound like lifters rattling, like when they run without oil. But oil dipstick show that it is Properly filled up, and so is the coolant reservoir. The coolant system was not overheating, the serpentine belt is Intact, and operating okay.
After it cooled for 4 hours, I drove it back home, without incident. No smoke was detected on the drive back, no erratic behavior, but I was driving very slow, not at highway speeds, like when the problem started.

It sounds like maybe a oil pump issue, but I haven't diagnosed the problem, which started today 06/26/2021. All these events happened today. Tomorrow, I'll check the codes on it.
How do I test for oil pressure?