Social security money is not free because anyone receiving benefits has to have paid into the social security system for a proscribed period of time.
There are many rules and strategies in claiming social security. A plurality of Americans start collecting Social Security when they turn 62 which is the first year SS can be claimed. Generally this is not a good idea but there are definitely circumstances where this is the best choice. An important variable is whether you are married. But that is just one of the first issues.
The downside to collecting your benefits from Social Security is that you do not optimized your benefits based on your own financial circumstances and you cannot undo receiving benefits after receiving them for 1 year.
I recommend reading about social security on the sea.gov website or talking to an advisor before making any decisions about receiving benefits.