Read the book Escape Your Shape by Edward Jackowski. He's the original guy who divided people into four body types (hourglass, cone, spoon, and ruler). The whole book's worth reading, since he talks about why warm-ups and stretching are actually important, and helps you sort out which body type you are. Then for each body type he describes (and has pictures) of 3 workouts that are beginner, intermediate, and advanced. All can be done at home or in a hotel room. You sound like a ruler, 'cause you were naturally thin but started to gain weight (probably in the stomach and butt) as you got older. So your exercises are designed to take off the extra weight, build up your muscles, and strengthen your abs and hamstrings, since rulers tend to have a bit of back pain caused by weak abdominals. I really can't recommend the book enough. It takes about two hours to read and you can do all the exercises from home. Give it a shot for a month or so and if you see good results, stick with it, if not, you didn't do any harm.