Well if your going to do weights right after cardio youll probably want a small snack before lifting. And if your doing cardio for pretty much legs the whole time I'd skip any sort of leg workout. You'll just want to do the basics pretty much. You probably have an assisted pullup machine, do that for 12-15 reps for 3-4 sets, and make sure thats to failure to where you couldnt even do another one with good form. You should know what bench press is, but if you dont want to ask people to spot you then just get a bench and a couple of like 20 pound dumbells and bench press those for 12-15 reps for like 3-4 sets. I would also suggest bent over rows, theyre awesome for your middle back, I'm really not sure how much you want here lol. for shoulders you can get a couple of DB, sit up straight, and pretty much push them from shoulder level and push straight up. If you do incline DB presses theyll make your boobs look perkier lol. And for the trainer, it really does not take much to become one lol.
This ones for shoulders
This ones for chest
thats for upper chest
thats a good back one
another good back one
They did not have an assisted pull up picture but its pretty easy to spot. pretty much a pullup bar and you stand on like a lever, then you put weight on the other side of the lever to make it easier for you to lift yourself. or a lat pulldown machine works pretty much the same. For all of these Id say 2-4 sets each with 12-15 reps. if your doing these, your arms are not directly stimulated but, youll use your arms a crapload in all of them giving them a good good workout anyways. I would do shoulders last too. You can pretty much go without rest the whole time, just do a set of back then go straight to chest, then go to back, then chest, you get the point. try to use controlled movements too, you run the risk of injury if your trying to throw the weight up instead of doing nice controlled movements. I hope you use this it took me like 15 minutes to write this lol.