It's great that you have thought about working out and finally getting into the shape that you want. For most people that's all it takes to get motivated and get started. But if you've been out of touch lately with working out it would be prudent to check with your physician to see if there are any health issues that you should be aware of.
I know it's a pain to set up an appointment with the doctor, probably take a couple of weeks to get in to see him or her. But in the long run it's worth it. I mean if you have any type of question in your mind affecting your health it really would behoove you to err on the safe side and at least talk with your physician.
Well now assuming that you have the green light and that you can withstand the rigors of a workout routine don't go wild. You need to gradually work up to an intensity that will do your body good. But that will take time. If you want to keep working out for a long time taking the long slow road is the best road to take. Don't believe that by working out hard and long will give you any more beneficial results. It won't. So take it easy. Go ahead and check this out for a great ab workout and you'll see what I mean.
Knowing which exercise routines will give you the results is important to know. You will get that information and change your life for the better.