Well , I want to buy adobe AE , but if I need a new monitor , unfortunately I'll have to give up, I live in Brazil , here everything is expensive prices , or I buy a new monitor or get with Adobe AE , The problem is if I can use monitor with 1366x768 without problems
You can always download a trial of AE and see if it works for you, but I don't think your monitor resolution will prevent the app from running, just be more of a pain to use since screen real estate will be at a premium.
That monitor does not meet the minimum system requirements. It will not work for After Effects. Some elements of the user interface will not fit. That is why the pixel dimensions of the display are listed in the system requiremens.