Go for the trainer if you can. It's a great way to get motivated and to push yourself farther than you would on your own. Also, a good trainer will make sure you don't injure yourself. It's a worthwhile investment. Just be careful, because not all trainers are good...some are downright horrible. Well done for working out though! Getting started is the hardest part. I always go, even if I don't feel like it and then, I just lie to myself that I'll only do 20 minutes and then, it goes to 40 and then, I figure 20 more and I'm done, right?