It is normal to fear change. Most people have become so used to the status quo that they no longer resist it or have grown to believe that will not be successful. THIS IS LIE AND COPING MECHANISM! You have a desire to be the Better You and you can as you do not give up!
There will always be echoes of doubt from the old you because it knows you can be successful and from the haters who will just be even more rotten inside when you accomplish what they are not able to. Accept that you may not make it on the first attempt or the third or the tenth, BUT there is no failure until your discpline and consistency succumb and that does not happen until your last breath.
Go boldly into your attempt and make it a great one. The glorious appreciation found in the striving will be amaze you. Go out and bring forth the Better You!
Nutrition + Fitness = Health