Ensure you have a stable income stream before you take attention away from it.
Let your audience, customers, and fans tell you what they want. If you can understand when your market wants something from you and if they are willing to pay for it, creating other revenue streams will naturally develop.
Testing ideas is essential.
Not all projects should be monetized. Some will pay you back in other ways like creatively energizing you or letting you experiment and fail, that may be valuable.