Hi, I hope you are doing great!

With that number of visitors, engagement and time spent in the site I am sure you are delivering great value to your readers/followers.

My first advice will be to keep thinking about delivering value. I've known some people that when they want to start monetizing their mindset changes and in the long run it is not sustainable, so keep adding value to your readers.

I don't know how long you've been having this engagement in your site, but the first thing I would do is find sponsors, businesses that want to target your readers and charge a fee to advertise in your site that way your readers won't feel that from one day to another you want to get their money.

In the meantime, if you still don't have it, add a sign up form in a pop-up, in the side bar and at the bottom of each post so you can convert Visitors/readers into subscribers.

I would definitely NOT enter the affiliate world, rather start creating a online course. Learn everything you can about your visitors/readers/subscribers, their wants and needs, their challenges and then help them solve it with a course.

I hope this helps you get started.

And don't forget, Keep Adding Value :)

If you feel my response was helpful, "Upvote" and if you need any further assistance contact me, I'll be glad to help brainstorm some ideas.

Have a great day

Gabriel