There are a lot of ways that you can monetize your content like articles and eBooks. Let me point out some of those.
1. Amazon KDP
KDP - Kindle Direct Publishing. The author can directly publish your ebook on the Amazon website and can set a price for an ebook.
KDP allows in Kindle(Readers can read in Kindle device or Kindle App), PaperBack, Hardcover, and Kindle Vella Story
2. Medium
Medium is a website where writers get paid when someone read their articles. If you write an interesting article, and if it attracts more people to read for a long time, you will earn more.
You need 100 subscribers before you monetize your content. And some countries are not eligible for Medium Partnership Program.
3. Blog
Most of you at least hear these words, Blogger, Blogging, Blog Post.
Let's say in simple words, you share your knowledge or thoughts on your mind on your blog as a writer. There are so many things you have to check out before, you start. For example SEO.
If you are going to start a blog, go with the paid version. Don't use Google blogger blogpost.com because it's free. Well, you can try it out as a training. But don't expect to make money, because mostly without a proper domain name google Adsense doesn't approve your website.
4. Freelancer
You can write a blog post for others for certain money. There will be so many offers for you in many category writing. You can choose them, you can reject them. It's your freedom.
If you want a certain offer, there will be so many competitors. You have to prove to your client that you are better than others. For that, you need communication skills. If you are good at your work but if you can't explain how good you are in your job is a big negative point.
Listen to your client about what he needs and ask the right questions to him. Provide a clear explanation about the solution to his problem or how you are going to finish his project.
Then communicate professionally. Because as a beginner your profile won't be much great. So you have to show them you are professional.
5. Quora
Yes, Quora has a monetization space, Quora+.
But it is surrounded by low-quality questions and Clickbait articles so if you can make money in Quora+ go for it. For beginners stay away from there.
Conclusion
If you are starting now go for Medium. You just need to get 100 subscribers. Subscribers from Medium are just like Youtube, if you give at least average content, you will get subscribed. Be aware that your country is eligible for Medium Partnership Program or not.
If you are satisfied with a Medium income then have a go with Blog and then move to Freelancing. Like this, you will get confidence in your skills, when explaining or submitting your work to clients.