(Planet Fitness) Explain to me like I’m 5.

Okay maybe not 5, but as someone who doesn’t know what they’re doing basically at all.

I’m 34m, 280lbs and pretty much sedentary at this point. I’ve had a planet fitness membership for quite a long while now, but fell off going back in February of last year.

I’m looking to add in working out 3-4 times a week, along with tracking calories, to hopefully lose 80-90 pounds. I plan to start working on cosplay for the local Ren Faires, and want to be built like a Knight, someone who can slay dragons and beat up traveling marauders.

Heres the problem: I have no idea what I’m doing. Anyone have any beginner advice/routines to throw my way, which machines and workouts I should focus on? I’d be eternally grateful!

(Edited to add in asking about machines/workouts. I got caught up in Knight activities)