It can’t be just a daydream. If you’re seriously considering this, look into it a little and find out what it’s is like; e.g., my impression is that very few novelists make a living at it. Those who do generally write in popular genres – thrillers, romance, etc. Personally, for me, writing genre fiction would be a “job” similar to clerical work. I have to write what interests me. But I don’t hold that against others who are thrilled to write successfully within a genre. So, basically, find out what you want to write, and what to expect. Be aware that writing is not a get-rich-quick scheme. If you want to write in film or TV, you need to move to L.A. Writing classes of all kinds are useful if only for meeting like minded people.