Need help in amazon niche site

I’m thinking to start an Amazon affiliate based niche site.
But My Concern is
1. should I use Amazon_in (India) or Amazon_com (U.S.)?

Or is there any other way to use both of them.

2. give me some tips which can help me in Amazon niche site.

3.Should I have my niche keyword in domain name or not

1. You can use both if you know to how to show different links to different geographic visitors. Build the site first and see where you're getting the most of the traffic from and decide which program converts best for your content.

2. Write in-depth reviews with at-least 1500 words for each product. There are 99 more tips remaining. It's hidden deep inside BHW so make use of the https://www.blackhatworld.com/search/.

3. If the keyword got enough search volume and the keyword domain is available, then by all means go with it.

Now stop thinking and take some action. Good Luck!