Ok, I assume you have a previous computer right? Based on that I will make a build that had a HDD (Storage for your old computer) and add just a SSD (Super fast storage. Great for Windows to boot on, games etc.) And I will make a build that is completely new (assuming you didn't have a computer before.
PCPartPicker part list:
https://pcpartpicker.com/list/Wzywd6
Price breakdown by merchant: https://pcpartpicker.com/list/Wzywd6/by_merchant/
CPU: AMD - Ryzen 5 1600 3.2GHz 6-Core Processor ($195.89 @ OutletPC)
Motherboard: Asus - PRIME A320M-K Micro ATX AM4 Motherboard ($58.98 @ Amazon)
Memory: Team - Vulcan 16GB (2 x 8GB) DDR4-2400 Memory ($122.99 @ Newegg)
Storage: SK hynix - SL308 250GB 2.5" Solid State Drive ($77.99 @ SuperBiiz)
Video Card: EVGA - GeForce GTX 1060 3GB 3GB GAMING Video Card ($194.99 @ Newegg)
Case: DIYPC - Zondda-O ATX Mid Tower Case ($25.89 @ Newegg)
Power Supply: Corsair - CX (2017) 550W 80+ Bronze Certified ATX Power Supply ($29.99 @ Newegg)
Operating System: Microsoft - Windows 10 Home Full - USB 32/64-bit ($109.98)
Total: $816.70
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-10-02 23:17 EDT-0400
That build^^ I assumed you had a previous computer and don't need a hard drive.
PCPartPicker part list:
https://pcpartpicker.com/list/Ff87QV
Price breakdown by merchant: https://pcpartpicker.com/list/Ff87QV/by_merchant/
CPU: AMD - Ryzen 5 1600 3.2GHz 6-Core Processor ($195.89 @ OutletPC)
Motherboard: ASRock - A320M-DGS Micro ATX AM4 Motherboard ($49.99 @ Newegg)
Memory: Team - Vulcan 16GB (2 x 8GB) DDR4-2400 Memory ($122.99 @ Newegg)
Storage: Team - L5 LITE 120GB 2.5" Solid State Drive ($50.98 @ Newegg)
Storage: Western Digital - Blue 1TB 3.5" 5400RPM Internal Hard Drive ($45.99 @ Amazon)
Video Card: EVGA - GeForce GTX 1060 3GB 3GB GAMING Video Card ($194.99 @ Newegg)
Case: Xion - XON-310_BK MicroATX Mid Tower Case ($23.98 @ Newegg)
Power Supply: Corsair - CX (2017) 550W 80+ Bronze Certified ATX Power Supply ($29.99 @ Newegg)
Operating System: Microsoft - Windows 10 Home Full - USB 32/64-bit ($102.89 @ OutletPC)
Total: $817.69
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2017-10-02 23:24 EDT-0400
This build is a complete build HDD and everything. If you didn't have a PC before this is good. 800 is your price range right?