If you enjoy writing history articles that are accessible and designed to be read by a wide audience, why don’t you try writing for history magazines? This is a great way to practice your writing technique and build up your portfolio.
Here is a list of magazines to get you started:
It is also helpful to build up your own online portfolio. You can create a website using WordPress and then upload your articles. This allows people to see your work presented professionally, all in one place.
Here is an example of a portfolio blog: