amazon dropshipping ebay doba dhgate aliexpress

hi everyone , new around BHW .. sooo let's begin I want to create a website or a blog where to post products from DHgate, now... i'm thinking if it will be a waste of time or i should give it a try... i really don't know, any opinion or answers will be good...

I am new into dropshipping. I am buying from a wholesale website and selling it on Amazon. Now I want to know- A) When I add a product in Amazon that already exists in Amazon, I click on “Sell On Amazon” then my Product get listed Under the SHADOW of the Existing product as “New (4) from $xx)...