I stopped going to a gym because it costs so much. Glad you got a free membership (or that you'll be able to).
I go to body conditioning twice a week. There we run for at least 12 minutes. We do abdominal work outs and dips. Push ups and lunges. By the end of the day, everything is sore. I go to yoga once a week at the end of the week to stretch everything out. I recover over the weekend. On the days I'm not in body conditioning, I run and do exercises at home. The exercises are just part of this one month plan where you do a different work out every day. Instead of one a day, I do two to four, only on the days I don't have body conditioning.
I can feel more strength, but I have not seen much visible change. It's a curse of my family. My dad was strong enough to lift 400 lbs but his arms still looked very thin. We cannot become buff men. If I am lucky I will have genetics from my mom's side that can help. I actually do see a little change in my legs. They're thicker slightly.
I hope I can change my chest. I'm trying to build muscle on my chest, back, shoulders, abdomen... that's about it. Legs and arms, too, actually. I am also trying to increase grip strength.