This is of course a very high bar to clear, as data such as people's names is highly confidential and almost impossible to get unless you're any one of these 750+ data brokers: https://privacyrights.org/data-brokers
You'd also need a fake ID. And be willing to risk a felony conviction to add a single vote. It just doesn't happen here, despite the GOP trying to prove otherwise for decades.
Confidential? You can buy the voter list from your state government. They legally have to give it to you.