The more clear and detailed your plan, the more likely you will do it. The easiest way to fight procrastination is to respond to it by initiating planning. If something seems too big to plausibly see from start to finish, you have not planned through it enough. When you have effectively created a plan, the barrier of entry into the first task drops down to next to nothing.
The more detailed the task, the more psychological leverage you will have in completing it. Every degree of uncertainty or lack of detail in a task will increase the emotional energy required to start and continue the task. The more details you have fleshed out, the easier it will be to feel as if progress is being made as you work.
So much procrastination and failure comes from people making the decision in the moment of action. There is no reason to wait until the moment of action to make the decision of how you will act. The act of planning is pre-executing the decision. All that remains is the action.
A specific list of explicit tasks will make it very clear what remains to be done. If you can’t say what the next few steps are in high detail, you haven’t thought about it enough.