From the above and your other posts, it sounds like we're in a similar situation (although I'm retired): 'Chunk/s' of available cash; no immediate need; low risk tolerance; not a financial whiz or interested in the work required to become one; realize that 'putting money under a mattress is a poor option ... even in today's volatile, uncertain markets).
While some pan the idea, I find that Annuities (immediate and longer term) AND managed accounts (for liquidity) 'answer the mail' for me. The annuities provide a pre-determined lifetime income (some include LTC options). The (conservatively)-managed accounts give you oversight, liquidity, investment flexibility, a higher ROI than CD's/T-Bills, oversight and ongoing guidance from (generally) an establish investment plan. Also, if you don't like the results, it's easy to change.