This is how I feel.
I don't think we'd be human if it wasn't somewhat nervewracking for many of us. They're close numbers materially and the stakes are (once again) higher than they've ever been. But all Republicans have done since '16 is continue to lose elections. I have yet to see evidence that is changing, and we're still up where we need to be in a lot of the polling (which, as you say, has ceased to matter). Still, I do have some anxiety any time we get this close.
I'll feel better on the night once I start to have my own suspicions borne out of course, just as they were overnight in 2020 (though it took a few hours) or in 2012.