The biggest mistake beginners make is going in without a plan and doing whatever feels comfortable. Comfortable usually means the equipment you already know, which is usually a treadmill. Cardio isn't a bad start but it's not why most people join a gym.
Get a program before you start. Even a basic one. At Adapt Fitness we offer free program writing sessions for all members — a 30-minute 1-on-1 with a trainer who builds something around your goals, your schedule, and any history of injury. This alone changes the first month experience dramatically.
Focus on the basics before anything else. Squat, hinge (deadlift pattern), push (bench or overhead), pull (rows and pulldowns). Every major goal — fat loss, muscle gain, strength — benefits from mastering these movements. Everything else is secondary.
Don't worry about everyone else in the gym. This is the one that stops people going in the first place. The reality is that experienced gym-goers are focused on themselves, not watching you. Everyone started somewhere.
Go at the same time. Consistency of schedule is more important than consistency of effort in the beginning. Pick a time that works with your life and make it a habit before you worry about optimising anything.
Our team is on the floor during staffed hours. Ask questions. That's what we're there for.