"You are what you eat"! I strongly believe that!
Why eat healthy? I will tell you why... Eating healthy means you are staying healthy and aiming for a healthy lifestyle. Is it hard? Maybe, or maybe not! It depends on YOU! Yes, you have to have the strong will to switch to low fat food... it may taste different to what you're used to because of the less spices and oil used in the cooking process... and here you have the choice to tame yourself to the new healthy taste (you may end up loving it actually) or just go back to what you are used to!
Keep in mind that not all low fat food is good for you... there are bad fats such as saturated fats and transfat. Those are the bad guys that you want to keep away from because all they do to you is raising your LDL Cholesterol (the bad one). Good fats such as monosaturated, polysaturated, and omega III lower your LDL Cholesterol. and raise the HDL Cholesterol (the good one).
So do this! When shopping for healthy food READ THE LABELS! A product of low fat cookies may state that its the ultimum snack with 100 calories only but then you read the word "saturated" or "trans" before fat... you may want to reconsider and put it back on the shelves ;-)
Also, while you are at it... look for the sugar content! Avoid sucrose and look for glucose.
Learn to eat balanced meals. Have plenty of fruit and vegetables to get your intake of minerals and vitamins. For protein eat meat. If you are a vegeterian or dont like any kind of meat replace it with beans and/or tofu. All you need is a healthy balance and a good food mix :-)
Make excercising and working out/going to the gym part of your routine to maintain your healthy lifestyle. If you cant afford going to a good gym than go walking/jogging/running... its free! Of course... it all need dedication and effort. It can be easy or hard.. the ball is in your court! Have a strong will and believe in yourself.
I would also pay attention to cravings. Dont deprive yourself! Its bad!!! You may feel disocuraged afterwards but know that if you dont deviate much from your diet than it wont hurt you much.