I just got into a gym and don’t know how to exercise to be able to see muscles in my body. I’m pretty lean but don’t have any muscles to show for. What’s a good routine for this? Remember I’m just starting. I would like to mix it with some cardiovascular exercises.

Most gyms have personel trained in this sort of thing. A certified personal trainer should be able to show you the ropes and give you some ideas of where to start for your lifts.