Welcome! If this was a transfer from a qualified account (401(k)) or similar, and it's considered an "Inherited IRA" (in your name with your husband listed as the former owner), then "Generally, you must begin taking RMDs for Inherited IRA assets by December 31 of the year after the year of the original owner's death." If it's not an IRA (let's say, just a cash payout from the company's insurance), then it's likely all taxable as income. You may want to consult a tax advisor, as I'm not one.
The account you've placed the money in appears to have an APR of 0.80%. I'd suggest moving it to Vanguard, as their money market fund is paying around 2%.