lenovo m73

Hello, I've been looking online and trying to figure out if this is a compatible and good upgrade I recently bought a ThinkCentre M73 Desktop with i3 4130t (upgraded to 16Gb ram and 500GB SSD) from FB marketplace. I've been using this system to run game hosting servers, modded Minecraft...

Im planning to upgrade my M73 and im having trouble what kind of motherboard and size of the power supply im going to get because the size of this motherboard is unconventional and the power supply is tiny and i don’t think i can find a conventional sized motherboard and power supply that fits...