A healthy lifestyle, is it posible? how?

Well, the answer for this question is absolutly yes, of course it's possible. But the thing is that if you don't have already a healthy lifestyle impressed from your parents, it would be very difficult to start a new lifestyle.
  For those who think in starting a healthy lifestyle, i think that the hardest part is quitting the junk food and fast food, and slowly introduce to the diet vegetables, fruits and rich in vitamin food. The second part is start doing excersice, even if it is walking for thirty minutes a day almost everyday, you have to start with something, and eventually increase the pace so start trotting a few times in a week. Also, if you have enough time, you can join a team of any sport you like and practice regularly.
  In my case, I used to do almost everything I wrote, but this year with the pace of the university i haven't being able to make it, so im feeling less energetic and i can't sleep very well. But at least i try to keep optimistic that someday i will be able to have a healthiest lifestyle than the one i have today.