If you find that you are unable to make a plan, or that you start off well but get blocked again after a while, do not despair. This is not a sign that there is no hope, only that there are additional issues that need to be addressed. Such difficulties are more the norm than the exception.
There may be a few or several false starts along the way to establishing your connection with regular writing, and you may find there is always a gap between your goals and your performance. This is normal, and you don’t have to hate yourself or give up hope because of it.
Congratulate yourself for valuing yourself as a writer, for deciding to consciously address your writing habits, and for having the courage and willingness to spend the time and effort required to improve them. Then, write a little bit too.