For weights you could start off with basic compound movements. Examples would be Squats,Deadlifts, and Benching. Since you are unsure on what to do with all the other exercises if you start with these you'll atleast be working a lot more muscle rather than doing just bicep curls. If you do say squats one day either do them first before your cardio or go to the gym two times a day once in the morning for your cardio and once in afternoon or when ever you have time for you weight lifting. I'm sure others can give you tips with the weights to.