What series of 500w BeQuiet?
500w is alright, but make sure it's not an entry-level system power unit or another comparable PSU.
I would go for the MSI B450 Tomahawk MAX since it supports 3rd generation Ryzen out of the box without having to worry about BIOS updates.
The Gigabyte B450 AORUS PRO is a good board, however, it may not support a 3600 without a BIOS update, which requires an older CPU to perform. AMD can loan you a CPU to update the BIOS, but I would go for the MSI B450 Tomahawk MAX to avoid any hassle involved.