Does your gym have a pool? That's an alternative for cardio. Also, does your gym have different classes such as biking ones, which are also good for cardio? Do you know how to play basketball? A lot of gyms have pick-up games at different times.

Does your gym have a trainer? They'll show you how to use the machines/set up a routine for you. Obviously they'd like you to utilize their services on an on-going basis, but you can use them 1-2x to get the routine set up & then do it on your own moving forward.

I primarily used weight machines vs. free weights (free weights more for biceps & triceps).

You can also google beginner's weight training. A lot of links come up w/ suggestions/illustrations/timeframes, from those for body builders to those for nerds.

Cheers.