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If you looking for creating affiliate website purchase a domain name as per your niche, you can purchase anyone of the below provider
godaddy
bluehost
with hosting plan it will cost approximately $15 to $20 per month
write some good quality content and submit to Google & Bing webmaster tool and share the post to social media for more traffic.

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I have few domain and hosting with Godaddy, once you purchase the package call to the customer care they will guide you, how to install the WordPress plugin in the domain, later that you can install the theme as per your requirement and write some quality content,
Refer some YouTube video search type will be " Create website using WordPress plugin"

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Affiliate linking is a good one , there is no need to spend money , contact affiliate sites and get processed

If you want to start Amazon niche affiliate marketing, You have to do the following things:

1. Niche selection
2. Keyword selection
3. Content writing
4. SEO
5. Organic traffic generation
6. Selling product and make money

Affiliate marketing is simple really.

You build a list of interested people in your niche market, you start building rapport and you sell relevant affiliate offers to them.

All you need is a simple, but high converting landing page to get the subscribers and a powerful email follow up sequence.

Now, I'm assuming that you have found your niche and the product that you want to promote, otherwise, you have to sort that first before you do anything else.

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