I have created 10 websites, how should I adjust my SEO strategy? I tried to publish an external link to get the ranking, but I could not get the ranking

I have created 10 websites, how should I adjust my SEO strategy? I tried to publish an external link to get the ranking, but I could not get the ranking.
The following is my website list and keywords
Custom Name Necklaces,diy necklace holder - http://customactnecklace.com/
personalized name necklace,custom necklace chain web - http://customanecklace.com/

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