I mean for the longest time my computer was pretty potato, 4GB RAM and like Nvidia 610 (gross), and (still)
an i5 Sandy Bridge, 2nd gen (yuck) and the worst I ever dealt with was lengthy loading times. But i upped myself from 4 to 16GB (DDR3) (2x8GB) and it was zoom zoom. So, depending on the Motherboard you're running, you could improve the performance buy a (relatively speaking ) inexpensive RAM upgrade. Graphics Card for this game probably isn't the biggest worry, I have a 1050ti and it runs like butter. Great website is
www.pcpartpicker.com (Canadian site but click the flag for your country) If you are going to go full hog and rebuild take a look. It's so much cheaper just buying the parts and either putting it together or if you don't feel confident paying a techie friend to help and or do it/show you how--I have no shame saying that's what I do.