Need help especially on cpu

[L3v1]

Country: Italy

 

I can’t decide on which cpu to get:

Ryzen 3 3200g        OR        i3 10300?????????

 

And which Motherboard if ryzen or i3?

[FRD]

Do you want to use it with a separate graphics card or use the integrated graphics?
I would say get the Ryzen 3 3200G, because the Vega 8 is a better integrated gpu.

For the motherboard I think an A520 chipset is fine for Ryzen and it's cheap. It depends on if you need ATX or mATX size too.
Some suggestions: 

Gigabyte A520M H (or DS3H or S2H)

Asus Prime A520M-K (or A520M-A or A520M-A II)

MSI A520M-A PRO

More expensive, but with more features:

Gigabyte Aorus A520 Elite

MSI MAG A520M Vector Wifi