Make fresh air your morning ally. Have a morning walk immediately after you got out of bed to enjoy the fresh air. Make natural air become your new „coffee in the morning“.
I will be honest with you. The way you are craving for coffee is ugly. I do not like how you act like a junky longing for caffeine. If you cannot have a proper day without your dose, change what you are doing.
You do not know where to start because you are overthinking. Thinking paralyzes you. It is the writer’s dilemma: Your job is to think (a lot) in order to write magnificent pieces but not not end up in a thinking loop that cripples you which is why you do not even start writing.
You are thinking too big. In your mental world you are already in a place where it will take months and years for reality to catch up. This discourages you — but you have only fantasized and not written even a single word.
If you make sure nothing distracts you and even eliminate the possibility of distraction you are at the right place. But this is only the first step.
Even if nothing distracts you there you can still distract yourself. Some people call that to „entertain oneself“. All of a sudden you want to clean dishes, wash clothes or wipe the dust. Say what? Procrastination is your ally in this kind of mindset and the enemy of focus.
That is why you need to take the second step.