Don't be sorry
. Anyhow, you still want to lift weights because if you are new, then there is a chance that you actually CAN gain a tiny bit of muscle while losing fat. They call this "newbie gains", and it happens with people who are new to working out. Anyhow, find a good cardio machine in that gym and use it 5 times a week for 30 minutes each time (don't go longer then that because you will be burning muscle). Start eating better otherwise your efforts are going to be for nothing. Lastly, talk to one of their trainers that are on the floor. He will give you a good weight lifting plan that you will follow while losing fat, which will be important since you are going to want to maintain the muscle that you have right now.
Your optimal goal in losing fat will be a weight loss of 1-2 pounds a week. Anything more then that will mean you are losing muscle as well. At first, you will most likely drop more then 1-2 lbs during the first week or two but don't worry, that is just water weight.
Hope that helps a little.