I would recommend, definitely, developing a 'day job' that you like - don't expect to make money writing!
Sentiment: POSITIVE
Writing is not the easiest way to make a living. Your work long hours, usually all by yourself. It is not a way to make money.
I'm still very blunt: If you want to be a writer, get a day job. The fact that I have actually been able to make a living at it is astonishing.
I can't recommend technical writing as a day job for fiction writers because it's going to be hard to write all day and then come home and write fiction.
I have a day job, which means my family isn't dependent on the writing income. So if I have an idea I like, I write it.
If your purpose is to make money, you shouldn't get into writing.
Writing is self employment, so you can make your own schedule.
My approach is to treat writing very much as a job.
Writing is a creatively rewarding occupation but for me very time consuming.
If you're going to write for a living, you should find something fun to write.
I'd much rather do an obviously commercial writing project than get a day job.