If it’s free there is nothing to lose (unless the guy hurts you doing his work).
In my experience, I love going to the chiro, feels so damn good. But I am a guy who cracks my own knuckles, toes, neck and back frequently. I feel like the chiro does some cracking (adjusting) that I can’t do myself, some deep stuff.
However, on the flip side, I feel like the adjustment lasts like a day or less. I leave the chiro office standing erect, perfect posture, feel great, and hours later i am already slouching again.
If it was free I would go as often as possible, if I have to pay out of pocket, I go rarely. Always enjoy a good adjustment.
Also on your first and maybe even second appointment, it’s highly unlikey they will give you the aggressive adjustment that is satisfying. YMMV