What Now To Help

I'm Retired with a Pension which isn't bad about 3,000 a month and I get soc sec disablity another 1700. My question I have allot of cash I'm only getting a few percent what can I do at 61 years old to help supplement my income.
Investments are not my strong point, I couldn't tell a stock , from a bond. What I'd really like is some Ideas of good interest investments to supplement what I'm now getting and to maximize the return any suggestions?.
Gene