Right now graphics card prices aren't the best, so the RX 550 you selected is actually pretty bad value for money.
That power supply also isn't that great, and you also don't have a case.
This build is better, but the graphics card is the 3200G's integrated GPU (the Vega 8), which will run the games you want to, but a decent bit slower than the RX 550. Hold on to that until graphics card prices get better, and then get something like an RX 570 for 150$.
PCPartPicker Part List
CPU: AMD Ryzen 3 3200G 3.6 GHz Quad-Core Processor ($128.99 @ B&H)
Motherboard: ASRock B450M PRO4 Micro ATX AM4 Motherboard ($77.98 @ Amazon)
Memory: Team T-FORCE VULCAN Z 16 GB (2 x 8 GB) DDR4-3000 CL16 Memory ($75.98 @ Amazon)
Storage: ADATA XPG SX6000 Pro 256 GB M.2-2280 NVME Solid State Drive ($37.99 @ Amazon)
Case: Thermaltake Versa H22 ATX Mid Tower Case ($48.98 @ Newegg)
Power Supply: SeaSonic CORE GM 500 W 80+ Gold Certified Semi-modular ATX Power Supply ($64.99 @ Newegg)
Total: $434.91
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2021-05-04 08:51 EDT-0400