It takes more work than you can possibly imagine to safely launch a new publication. Love is important. If you love your subject, or you are driven by a personal mission of some kind, then you'll find it much easier to survive the rigorous life of an independent publisher. Maybe so, but give yourself top points ONLY if you have convincing evidence that your readers need to hear what you have to say to them. Lots of would-be publishers forget to make sure there is a deep and abiding need in the world for the information they want to provide.
Success takes several years to achieve for most newsletters or magazines.
For example, if you want to write about your divorce, write a book, don't launch a newsletter. Hopefully, you'll soon recover from your divorce and move on to a different topic. Periodical publishing is a very risky business with an extraordinary failure rate. There are lots of ways to control the risks if you are willing to consider them. For example, getting other people involved, either as investors or as contributors can vastly improve your odds of success.