First Things First

It is impossible to have an effective training plan unless you are clear about your goals.

Thinking about what you would like to accomplish is serious business.

A strong personal commitment must be made - for example wanting to lose  20 pounds of fat while gaining some lean muscle requires training, cardio and dietary changes.

The exact program for training, the method of cardio and how the diet is changed will require some personal choices.  The more seriously you approach the method, the more likely you will be to reach your goals.

Luck has nothing to do with this.  

You can accomplish whatever you set out to as long as the goal is clear and the plan is doable. Seek some good information and or help from a personal trainer and get going.