Hi, I think Kyle may of miss understood your question.
I created a video that will show you a couple of different ways to add banners to a blog page/post and widget area. https://my.wealthyaffiliate.com/training/how-to-add-wa-affiliate-banner-to-a-blog
If you run into problems just reply.

I agree with Kyle and recommend adding content first too.

Simply do a search in Google:

affiliate programs + Your_Niche

Replace Your_Niche with your niche and you will find a bunch of affiliate programs you can join. You can put affiliate links on either pages or post, the key is the promotions to be relevant.

If you don't have content yet, you should not be thinking about affiliate links. The key is to get content first and to get it ranked and affiliate promotions are only going to get in the way of this process.