Paying for courses

Hi I am a new Seller I paid this guy $600 dollars so far he gave me an arbitrage product to sell but it is doing so bad I lost about $1500

He really got me into it by telling me that I will be a millionaire in few years he wants me to pay again $600 so he can give me Alibaba product and I will pay for the rest which is 3600 for production and shipping

How does Amazon work really should I keep trusting this person ?? He never mentions the downfalls only amazing things how he helped people become millionaires