Do it. I LOVE Planet Fitness. I was terrifed of the gym, too, but this is totally different. AND they'll show you how to use all the things if you want.
There's also pizza once a week and bagels once a week, but not when I go
Pizza is the first Monday of the month (I workout in the morning on Mondays) and bagels is the second Tuesday of the month (I workout in the evening on Tuesdays).
They also have the NICEST showers ever. No massive naked shower parties. Private, individual showers.
I wish they had lockers you could rent long-term so I could leave my gym stuff there, but alas, they don't. But for $10 a month I can live with that.
The annoying part is that so many people will tell you Planet Fitness is stupid, not a real gym, etc. Except those assholes are the reason people need a place like Planet Fitness in the first place. Everyone is super nice at the one I go to. Sure beats the crap out of the "real gym" that costs an arm and a leg to join, and is also owned by the same people who own a local overpriced shitty fast food place.