improving my fsx eperience

hey.my name is mikael and i would like to know how i can improve my fsx experience
do i have to change core?
do i have to change graphis card?
here are my pc specs
http://www.dell.com/support/article/us/en/04/SLN296934/en
I have an intel core I3 4 th gemeration with intel 4450 hd graphics

and i also want to know which graphic card or cpu is best for fsx
thank you 😀 😀