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It might be a good idea - and this is just a personal view - to try High Sierra.
The last time Apple used an i5-3470 was 2012 and the iMac13,1 definition. They released it with "Mountain Lion" and support stopped with "Catalina". However, having said that, a PC which is non-Apple hardware might not make it as far as Catalina.
Remember too, you are using a GPU that Apple
never did. Lexa is not supported despite the fact that very occasionally people can "spoof" it to a Baffin chipset and get a card working. This isn't guaranteed though, and some try for ages and get nowhere.
Sadly the HD 2500 Intel graphics in your CPU is not supported either.
If you get a graphical interface when you start the installer then chances are you can complete installation even if the end result is stuttering, jerky display output.
If you can install High Sierra then you can, at least, install a cheap NVidia GPU like the GT710 or GT730 and get full accleration.