Wanna, congratulations on the action you've taken for yourself. I'm glad you found a place where you feel comfortable. I've been a member of several different types of gyms over the years and the ones that didn't have the right
feel to me, those were the ones I didn't want to go back to.
Starting as a complete beginner, I'd definitely go for a good cardio workout to start. That's what burns fat most effectively. But you don't burn fat until you get your heart rate up to the target zone. That requires warming up first. So go for the treadmill for five minutes at an easy, comfortable rate. Then get off the treadmill and stretch. Check this site out for flexibility exercises:
http://www.thewalkingsite.com/stretching.html. Then get back on the treadmill and walk at a rate faster than your warm up rate, but one at which you're still comfortable, where you can still breathe easily and talk a little. Walk at this rate for just 15 to 20 minutes. After that, slow it down to your original rate and walk another five minutes.
Try to walk on the treadmill without hold on to it. The more you hang on to the treadmill, the lower your heart rate remains. If you get bored, increase your speed for a minute or two, then bring it back down for three to five minutes. And do that for a few cycles. This is called HIIT (high-intensity interval training). This is a really efficient way to ramp up your fat burning, plus it makes the fat burning last longer into the day, even when you're not on the treadmill.
So, after you're off the treadmill, do the same stretches you did at the beginning. You can do this little workout everyday, seven days a week, even twice a day. Stick with it for a couple of weeks and you'll start feeling really good! If you want additional motivation, bring an mp3 player and listen to some tunes. They are very motivating. An mp3 that I enjoy, and even got me into jogging, is Cardio Coach. You can buy it here:
http://www.cardiocoach.com/. They've even got a sale on their downloads now!
After a week or so, you may be ready to get into weight training. This is an excellent time to hire a trainer, if you feel the need to have someone coach you on form. Good form is very important in weight training. If you want to try it on your own, the machines are a good place to start. Once you're into the weights, then it's good to switch to free weights. They provide a much better workout. But the machines are good for starters.
It's best to lift weights after a warm up on the treadmill plus stretching. Do your cardio after weight training, because the training will elevate your heart rate and you won't have to wait so long to get into the fat burning zone.
Start weight training with the most weight you can do while keeping good form, just one set of 10. When this gets easy to do, increase to two sets of 10, and later three sets of ten. You'll be ready to read The New Rules of Lifting for Women by then, which is really informative.
Okay, there's a good start for you! Keep us informed on your progress.
Georgia