iMac 27" early 2010 can I connect 2 extra monitors?

Hello guys I have already installed one extra display but I would like to install another one, I mean: My iMac (High Sierra) Plus 2 extra displays or monitors how ever you like to call them. I order in amazon a mini display with 2 HDMI ports but when I install it it doesnt work just works like a mirror and impossible to fix in system preferences displays!

Is there any way?? Maybe a mini display from my iMac that convert in 2 mini displays? or I am tied to buy one of those expensive hubs or docks??

Thanks a lot for your help!

This are the only ports that I have!