Non-circuit workout routine?

I am newer to the gym (have been going for about 4 months now) and am trying to get in shape for my wedding! The gym has been so packed recently and as a girl, I am a little intimidated when I am there. All the workout routines I am finding are circuit or supersets and it is hard for me to switch machines without a machine being taken when I come back! I also feel so guilty if I take a bench and only use it for part of the workout since I can see people waiting for it! Any routines that can help with this!