I’d recommend a non-contact voltage tester for this. They’re not perfectly reliable. Some people will tell you they tell you one of two things: that the wire is hot, or that it probably isn’t hot. That is, they’re somewhat prone to false negatives, which is of course the result you’d least like to have! Careful use can mostly mitigate this issue, though. Test on a known live wire/outlet to verify it lights up, then test on the socket you’re interested in while it’s hot to verify it lights up in there. Then kill the power and confirm the tester doesn’t light up.
The advantage these have over multimeters is that you don’t need any bare contacts or wire to test on. If you’re feeling very cautious, you can follow the procedure above with a non-contact voltage tester, then carefully remove the wirenut on the black (hot) wire, and check for AC voltage between the various blacks and ground with a multimeter. I don’t bother, myself. If my non-contact tester lights up next to the black wire before I hit the breaker, and doesn’t after, then I’m sufficiently confident there’s nothing live in the box.
However, I’ve also mapped out every circuit in my house (old house, some circuits have a definite theme and others are all over the place) so I’m pretty confident before I even do any checking as to which breaker controls which device.
I see in my link the related items selections include a set including the non-contact tester, a multimeter, and a plug tester. That’s the perfect combo of testing equipment if you intend to do any amount of DIY electrical work.