If it's in your budget I'd change out the MB to a B550. Don't know what your gpu is so hard to say on the 500w psu.I want to build a pc so here are the specs
Ryzen 5 3400g
Gigabyte B450M H
G skill 2x8 3200mhz ram
Silverstone 500w 80plus certified psu
What I wanted to know is, is this a good combination and for future upgrade on cpu or gpu is the mobo ok?