If you don't mind getting stuff from Overseas, technically possible.
Mobo: ASRock B450M-HDV AM4 AMD Promontory [Newegg] - $83.99
CPU: Ryzen 2600 [Newegg] - $232.99
RAM: Team T-Force Vulcan 8GB (2 x 4GB) DDR4 3000MHz [Newegg] - $83.99
GPU: MSI RX 570 8GB OC [Lazada] - $269
PSU: Seasonic S12II 520W PSU [Lazada] - $89
Casing: Tecware Nexus M mATX [Lazada] - $48.90
Monitor: PHILIPS 226V4L Refurbished [Lazada] - $39
HDD: Toshiba 1TB: $54
Total: $900.87
Is it the best system / best value for money? Nah.
Can it play Fortnite / Overwatch? Hellyeh.
If you die die want a SSD.
Drop CPU to Ryzen 3 2200G [Newegg] - $152.66
Then buy a cheap SSD ADATA Ultimate SU650 2.5" 240GB [Newegg] - $51.99
Total: $872.53 (Still can get ~60FPS on 1080p High/Epic settings for Fortnite)
IF YOU DIE DIE want to get a new monitor and SSD,
then drop the CPU to Ryzen 3 2200G [Newegg] - $152.66
drop Graphics Card to SAPPHIRE NITRO+ RX 570 4GB [Lazada] - $199.
SSD: ADATA Ultimate SU650 2.5" 240GB [Newegg] - $51.99
Monitor: Acer K2 Series K242HQL [Lazada] - $138
Total: $901.53