Savings sitting in USFR, but eyeing VOO/SPY.

Not looking for financial advice or instruction, just a general consensus while I continue researching. I moved my savings a few years back to USFR to at least get a little dividend earnings that reinvest automatically from it just sitting there. I'm not displeased with the results, but now than my life has normalized after a rough patch (along with the fact that USFR's dividend rate has dropped by nearly 2% since then), I'm looking into investing it properly long-term.

I want to move it to a better long-term option with a good bit of diversity and see that VOO or SPY are good options for investing in the S&P 500. In your opinions, is that a better place to move my money to, or should I leave it for now and continue researching better options? Any links to articles and professional discussions on this for more insight are greatly appreciated.