i want to start going to the gym again. I'd like to do a mix of cardio and weight training. I don't need to gain crazy muscle mass. I just want to improve general fitness.

How do I structure a weight training routine? Ideally I'd like something like "pick an exercise from columns A,B, and C, and two from column D". It's surprisingly hard to find something that makes it brainless. All the resources I find are to the effect of "how to crush massive weights and get huge".

I'd also like to find a way to get cardio benefit from workouts, because I hate droning away on the treadmill or elliptical.

Thanks for any suggestions.