You are probably planning to write a story that will later be published as a book. A good starting point. There is enough inspiration because you have the story in your head. But how long will it be? You probably don't know because something like that is very difficult to calculate when you start your story. I advise that as a novice writer you assume that your story will be a maximum of 100,000 words. Much less is also possible. If you are writing a thriller, it is not so easy to maintain the tension in a long story. The number of 100,000 is only a rough guideline.
I mentioned "discipline". For example, try to write 3 pages every day. Depending on the margins and size of the letters, that is about 1700 words. That means that you can write a book of 100,000 words in two months, PROVIDED that you get three pages on paper every day. Well, that is easier said than done. There are days when you don’t have time to write, but try to work on your story as much as possible. Believe me, three pages a day is quite a lot. Make it two and maybe even less. But if you don’t write for two weeks, for example, you need time to “get back into the story”. That’s why I call it discipline.
An example of how you can try to bring continuity to your writing. Make it a habit to write two pages a day and do that at least five days a week. Two pages, say 1000 words in total. If you write five days a week, twenty days a month, then you will write 100,000 words in five months. It remains a rough number, but we have to start from something.
Writing a story of 100,000 words in five months is really very good.
Get used to a certain method of writing. You have written two pages on Monday and are sitting behind your laptop again on Tuesday. Start by rereading the two pages you wrote yesterday, removing any errors, adjusting the story if you think it is necessary, and then start on the next two pages. This method of writing generally works quite well.
Inspiration is necessary to write a story, but I feel that discipline is just as important. Sometimes you sit behind your laptop and can't get the words on paper properly. Don't give up right away and keep going. You write because you enjoy it. It's one of your hobbies. One day you'll be holding a book in your hands with your name on it.
More next time,
Rolf